Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux ( 2001 )


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  •                   Investment of Federal Trust Funds for Cheyenne River
    and Lower Brule Sioux
    Congress intended the term “interest” in title VI of the Water Resources Development Act of 1999 to
    have its usual and customary meaning: the coupon rate of the debt obligation.
    The universe of “available obligations” under title VI of the Water Resources Development Act of
    1999 includes obligations of government corporations and government-sponsored entities whose
    charter statutes provide that their obligations are lawful investments for federal trust funds.
    The fiduciary duty owed pursuant to a federal trust fund is defined and limited by the terms of the
    statute creating the trust.
    January 19, 2001
    MEMORANDUM OPINION FOR THE GENERAL COUNSEL
    DEPARTMENT OF THE TREASURY
    You have asked for our opinion concerning the Secretary of the Treasury’s
    investment responsibilities for the Cheyenne River Sioux Tribe and Lower Brule
    Sioux Tribe Terrestrial Wildlife Habitat Restoration Trust Funds (“the Sioux
    Trusts” or “the Trusts”) under section 604(c) of the Water Resources Development
    Act of 1999 (“the Act”), in light of the federal government’s trust responsibilities
    for Indian tribes. Specifically, you have inquired whether section 604(c)(2) of the
    Act requires Treasury to invest the Trusts’ monies in obligations bearing the
    highest rate of interest, even when those obligations do not have the highest yields
    for the Trusts. You have also asked whether the universe of “available obligations”
    under section 604(c)(2) includes obligations of government corporations and
    government-sponsored entities (“GSEs”) with provisions in their charter statutes
    making their securities lawful investments for all federal trust funds, notwithstand-
    ing the provision in section 604(c)(1) limiting the Secretary’s investment of Trust
    monies to interest-bearing obligations of the United States or obligations guaran-
    teed by the United States as to both principal and interest.
    We conclude that, even if the Act requires the Secretary to assume the strictest
    of fiduciary duties when making investment decisions for the Sioux Trusts—a
    question we do not decide—this duty is defined and limited by the terms of the
    Sioux Trusts established in the Act itself. Under the Act, the Secretary must invest
    the Trust monies in the obligations with the highest rate of interest, not the highest
    yield, among available obligations. Furthermore, the universe of available
    obligations under the Act includes obligations of government corporations and
    GSEs whose charter statutes provide that their obligations are lawful investments
    for federal trust funds.
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    Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux
    I.
    Title VI of the Water Resources Development Act of 1999, Pub. L. No. 106-53,
    
    113 Stat. 269
    , 385-97, designates the Department of the Treasury as the program
    agency for managing trust funds for two South Dakota Sioux Indian tribes. The
    funds are to be used to finance the restoration of terrestrial wildlife habitat loss
    resulting from flooding related to certain federal water projects. Under the Act, the
    Secretary is required to transfer $5,000,000 from the general fund of the Treasury
    to the Sioux Trusts “for the fiscal year during which this Act is enacted and each
    fiscal year thereafter” until the aggregate amount in the Trusts is equal to at least
    $57,400,000. 
    Id.
     § 604(b)(1). Of the total amount deposited, 74 percent must be
    deposited in the Cheyenne River Trust Fund, and 26 percent must be deposited in
    the Lower Brule Fund. Id. § 604(b)(2).
    Section 604(c) of the Act governs the investment of the two Sioux Trusts. It
    provides:
    (c) INVESTMENTS.—
    (1) IN GENERAL.—The Secretary of the Treasury shall invest
    the amounts deposited under subsection (b) only in interest-
    bearing obligations of the United States or in obligations guaran-
    teed as to both principal and interest by the United States.
    (2) INTEREST RATE.—The Secretary of the Treasury shall
    invest amounts in the Funds in obligations that carry the highest
    rate of interest among available obligations of the required
    maturity.
    Paragraph (1) is a relatively common description of permitted investments for
    federal trust funds. 1 By contrast, paragraph (2)’s direction that the Secretary invest
    the Trust monies in the obligations with “the highest rate of interest among
    available obligations” is apparently unique among federal trust funds. We have
    been unable to identify a similar provision enacted by Congress, and your Office
    has informed us that it has never encountered such a provision.
    1
    See, e.g., 16 U.S.C. § 1606a(c)(2)(A) (Reforestation Trust Fund); 
    42 U.S.C. § 401
    (d) (Federal
    Old-Age and Survivors Insurance Trust Fund); 
    42 U.S.C. § 1104
    (b) (Unemployment Trust Fund); 42
    U.S.C. § 1395i(c) (Federal Hospital Insurance Trust Fund); 42 U.S.C. § 1395t(c) (Federal Supplemen-
    tary Medical Insurance Trust Fund).
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    II.
    Our interpretation of the investment provision of the Trusts must be considered
    in the context of the federal government’s unique relationship with the Indian
    tribes. The federal government’s trust responsibility to the Indians is a concept that
    has evolved over time. Although its origins can be found in an early Supreme
    Court opinion describing a tribe’s relationship to the federal government as that
    “of a ward to his guardian,” 2 it has subsequently been applied by courts to
    establish and protect rights of Indian tribes and individuals in their dealings with
    the government. See Felix S. Cohen, Handbook of Federal Indian Law 220-28
    (1982). The Supreme Court has on several occasions recognized what it has
    termed a “general trust relationship” between the United States and Indian tribes
    and people. See, e.g., United States v. Mitchell, 
    463 U.S. 206
    , 225 (1983) (noting
    “the undisputed existence of a general trust relationship between the United States
    and the Indian people” independent of statutes and regulations); Seminole Nation
    v. United States, 
    316 U.S. 286
    , 296-97 (1942) (“[T]his Court has recognized the
    distinctive obligation of trust incumbent upon the Government in its dealings with
    these dependent and sometimes exploited people. . . . Under a humane and self
    imposed policy which has found expression in many acts of Congress and
    numerous decisions of this Court, [the federal government] has charged itself with
    moral obligations of the highest responsibility and trust.”). 3
    As part of this responsibility to the Indians, Congress has established statutory
    trusts serving a wide variety of purposes. While acknowledging the existence of a
    general trust obligation between the government and the Indians, the Supreme
    Court has held that only certain statutory trusts impose affirmative fiduciary
    obligations on the United States. In United States v. Mitchell, 
    445 U.S. 535
     (1980)
    (“Mitchell I”), the Supreme Court concluded that the language of the General
    Allotment Act, which required the United States to hold land “in trust for the sole
    use and benefit of the [allottee],” did not impose any fiduciary management duties
    on the United States or render it answerable for a breach of any such duties: “The
    [General Allotment] Act does not unambiguously provide that the United States
    has undertaken full fiduciary responsibilities as to the management of allotted
    lands.” 
    Id. at 541, 542
     (quotation marks and internal citations omitted). The Court
    2
    Cherokee Nation v. Georgia, 30 U.S. (5 Pet.) 1, 17 (1831). This case involved a suit filed by the
    tribe in the Supreme Court to enjoin enforcement of state laws on lands guaranteed to the tribe by
    various treaties. In concluding that the Court lacked original jurisdiction over tribal matters, Justice
    Marshall characterized the tribes as “domestic dependent nations” which “look to our government for
    protection; rely upon its kindness and its power; and appeal to it for relief to their wants; and address
    the President as their great father.” 
    Id.
    3
    This unique relationship is further demonstrated by a line of cases that hold that any ambiguities
    in statutes or treaties dealing with Indian tribes are to be interpreted in favor of the tribes. See
    DeCoteau v. Dist. County Ct., 
    420 U.S. 425
    , 444 (1975); McClanahan v. Arizona State Tax Comm’n,
    
    411 U.S. 164
    , 174 (1973); Choctaw Nation v. Oklahoma, 
    397 U.S. 620
    , 631 (1970).
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    Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux
    further noted that Congress included the trust language “not because it wished the
    Government to control use of the land and be subject to money damages for
    breaches of fiduciary duty, but simply because it wished to prevent alienation of
    the land and to ensure that allottees would be immune from state taxation.” Id. at
    544. In a second case, United States v. Mitchell, 
    463 U.S. 206
     (1983) (“Mitchell
    II”), the Court reconsidered and elaborated on whether the United States had
    assumed fiduciary obligations as trustee with regard to the management of timber
    on tribal allotted lands. The Court concluded that the series of statutes and
    regulations governing the management of Indian lands was sufficient to create a
    fiduciary relationship where the Allotment Act by itself did not: “In contrast to the
    bare trust created by the General Allotment Act, the statutes and regulations
    [managing timber resources] clearly give the Federal Government full responsibil-
    ity to manage Indian resources and land for the benefit of the Indians. They
    thereby establish a fiduciary relationship and define the contours of the United
    States’ fiduciary responsibilities.” 
    Id. at 224
    .
    Lower courts have applied and elaborated upon the distinction between “bare”
    trusts and trusts giving rise to full fiduciary responsibilities. For example, in
    Brown v. United States, 
    86 F.3d 1554
     (Fed. Cir. 1996), the Federal Circuit held
    that a statutory scheme asserting control by the Secretary of the Interior over
    commercial leasing of allotted lands constituted more than a limited trust and
    thereby gave rise to enforceable fiduciary obligations under Mitchell II. The court
    reiterated the Mitchell II criteria for imposition of fiduciary duties and observed
    that an express reference to a fiduciary duty was not necessary: “‘[W]here the
    Federal Government takes on or has control or supervision over tribal monies or
    properties, the fiduciary relationship normally exists with respect to such monies
    or properties (unless Congress has provided otherwise) even though nothing is said
    expressly in the authorizing or underlying statute (or other fundamental document)
    about a trust fund, or a trust or fiduciary connection.’” 
    Id. at 1560
     (quoting
    Mitchell II, 
    463 U.S. at 225
    ). In an application of Mitchell I, the District of
    Columbia Circuit held that the establishment of an explicit trust as a mere funding
    mechanism and without significant governmental management duties would not
    impose any fiduciary responsibilities to those who may benefit from the trust.
    Nat’l Ass’n of Counties v. Baker, 
    842 F.2d 369
     (D.C. Cir. 1988). There, the court
    considered the State and Local Government Fiscal Assistance Trust Fund, created
    under the Revenue Sharing Act to provide “noncategorical financial assistance to
    local governmental units in the form of annual entitlements.” 
    Id. at 372
    . Associa-
    tions of local governments brought suit asserting that the Act created a federal
    fiduciary responsibility under Mitchell II to the local governments that were
    beneficiaries of the trust. The court held, however, that the trust was only a
    funding mechanism and did not include the type of control or management scheme
    that gives rise to fiduciary obligations:
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    While it is true that the Revenue Sharing Act establishes a Trust
    Fund and names the Secretary as the trustee, we believe the Act cre-
    ates only a limited trust relationship similar to the trust discussed in
    [Mitchell I]. . . . We do not think that when Congress created this
    Trust Fund and made the Secretary trustee Congress did so with the
    intent that the trustee would be subject to money damages for
    breaches of fiduciary duties. Rather, Congress created the Trust Fund
    in order to ensure constant funding for the Revenue Sharing Pro-
    grams. . . . By creating the Trust Fund Congress was able to appro-
    priate funds in advance, for the life of the program, thus enabling the
    local governments to budget their programs in advance.
    
    Id. at 375, 376
    .
    The Sioux Trusts at issue here have qualities of both the Mitchell I and the
    Mitchell II trusts. On the one hand, the Trusts can be viewed as a funding mecha-
    nism for money appropriated by Congress—money that will ultimately be
    disbursed after capitalization to the tribes for their use in wildlife habitat restora-
    tion. Thus, one might conclude that the Trusts do not constitute federal “control or
    supervision over tribal monies or properties” in the sense contemplated by
    Mitchell II, but rather are bare trusts or appropriation tools akin to those discussed
    in Mitchell I or Baker. On the other hand, the statutory scheme is intended to
    compensate the tribes for losses incurred to their lands as a result of flooding
    related to a federal water project, and the Act contains very specific federal
    controls and limitations on the tribes’ spending of the monies transferred for their
    use. See Pub. L. No. 106-53, § 604(d)(3), 113 Stat. at 390.
    Even assuming, however, that the Act requires the federal government to
    assume the strictest of fiduciary obligations to the tribes, that responsibility is still
    defined by the terms of the statute itself. Indeed, in Mitchell II, the Court conclud-
    ed that the statutes and regulations giving the federal government responsibility to
    manage Indian resources and land for the benefit of the Indians both “establish a
    fiduciary relationship and define the contours of the United States’ fiduciary
    responsibilities.” 
    463 U.S. at 224
     (emphasis added). Courts that have found a
    fiduciary obligation akin to that in Mitchell II have similarly held that the statutory
    scheme creating a government trust both defines and limits the nature of the
    government’s duties. See Brown, 
    86 F.3d at 1563
     (quoting Mitchell II and holding
    that the validity of a tribe’s breach of trust claim must be measured against the
    terms of the statute creating the trust and its accompanying regulations); Short v.
    United States, 
    50 F.3d 994
    , 998-99 (Fed. Cir. 1995) (statute dictating interest rate
    for Indian Money, Proceeds for Labor trust accounts controls payment of interest
    on trust funds held by the United States for the benefit of Indians); Cheyenne-
    Arapaho Tribes of Indians of Oklahoma v. United States, 
    512 F.2d 1390
    , 1393 (Ct.
    Cl. 1975) (holding that tribes’ suit for breach of fiduciary duty based on the United
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    Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux
    States’ breach of its duties as trustee to tribes would be determined by reference to
    the statutory scheme governing Indian trust funds deposited in the Treasury).
    Thus, even assuming that the United States owes the Sioux tribes the strictest of
    fiduciary obligations in administering the Trusts (in addition to its general
    obligations of good faith and fair dealing with the Indian tribes), the specifics of
    that obligation are found in the statute creating the trust: “Whatever the scope of
    the government’s legal duties under the [Indian] trust, the source is statutory law.
    The extent of a trustee’s duties and powers is determined by the trust instrument
    and the rules of the law which are applicable. Accordingly, even though the trust is
    a trust as that term is used in Mitchell II, plaintiffs must point to rights granted by
    statute if they are to be enforced against the government.” Cobell v. Babbit, 
    91 F. Supp. 2d 1
    , 30 (D.D.C. 1999) (citations and internal quotation marks omitted).
    III.
    With this principle in mind, we turn to the specific questions of statutory inter-
    pretation. First, we consider whether section 604(c)(2), which directs the Secretary
    to invest the Sioux Trusts in obligations “that carry the highest rate of interest
    among available obligations of the required maturity,” requires the Secretary to
    invest the trust funds in obligations with the highest coupon rate, or those obliga-
    tions with the highest yield. We understand that this distinction has significant
    investment consequences. The coupon rate of a security is the stated annual rate of
    interest on the face value of a debt security. Barron’s Financial Guides, Dictionary
    of Financial and Investment Terms 116 (4th ed. 1995). For instance, one might
    purchase a $1000 bond with a 10 percent coupon rate, earning $100 per year. In
    contrast, the “yield” of a security is a way of describing an investor’s percentage
    return on his investment. Id. at 663-64. A $1000 bond with a 10 percent coupon
    rate that is purchased for $1000 offers a 10 percent current yield or “effective
    rate.” Id.at 159. Yet that same $1000 bond with a 10 percent coupon rate, but
    purchased for $500, would offer an investor a 20 percent yield. When the price of
    a bond falls, its yield rises, and vice versa.
    In Old Colony Railroad Co. v. Comm’r, 
    284 U.S. 552
     (1932), the Supreme
    Court considered a tax statute that permitted companies to deduct from their
    income “all interest paid or accrued within the taxable year” to holders of its
    bonds. 
    Id. at 554
    . Old Colony sold its bonds at a premium and sought to deduct the
    amount of the interest payments (the coupon rate) on those bonds from its gross
    income. The government argued that Old Colony could not do so because the
    statute that authorized the deduction of “all interest paid or accrued” actually
    referred to the effective rate (or the yield) of the bond, not the coupon rate.
    Because Old Colony sold its bonds at a premium, the government argued that it
    could only deduct the lower effective rate, not the rate on the face of the coupon.
    The Supreme Court disagreed and held that when Congress uses the word
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    “interest” without further explanation, it intends the usual meaning of the word,
    which is the coupon rate:
    [A]s respects “interest,” the usual import of the term is the amount
    which one has contracted to pay for the use of borrowed money. He
    who pays and he who receives payment of stipulated amount con-
    ceives that the whole is interest. In the ordinary affairs of life no one
    stops for refined analysis of the nature of a premium, or considers
    that the periodic payment universally called “interest” is in part
    something wholly distinct—that is, a return of borrowed capital. . . .
    We cannot believe that Congress used the word having in mind any
    concept other than the usual, ordinary and everyday meaning of the
    term, or that it was acquainted with the accountants’ phrase “effec-
    tive rate” of interest and intended that as the measure of the permit-
    ted deduction.
    
    Id. at 560-61
    . 4
    In an opinion interpreting the Second Liberty Bond Act, the Attorney General
    likewise concluded that the term “interest” was unambiguous. See Second Liberty
    Bond Act, As Amended—Bonds Issued at Discount—Effective Rate of Interest or
    Cost to Treasury, 42 Op. Att’y Gen. 27 (1961). There, the Attorney General
    considered whether the Secretary of the Treasury could sell discounted bonds at a
    coupon rate of 4¼ percent, thereby resulting in a greater yield or effective rate,
    where the Bond Act limited the “rate or rates of interest” on United States bonds to
    4¼ percent. Id. at 29. Citing Old Colony, the Attorney General concluded that the
    limitation on interest rate referred to the coupon rate, and could not be read as a
    limit on the effective rate or yield of the bond: “[W]hen Congress uses the term
    ‘interest’ in connection with bonds without further explanation, it refers to the
    coupon or stated rate, the usual meaning of that term, and not to the accountants’
    concept of effective rate.” Id.
    We recognize, of course, that any ambiguities in statutes dealing with Indian
    tribes are to be construed in favor of the tribes. See supra note 3 (citing cases).
    But, like the Supreme Court in Old Colony and the Attorney General in his 1961
    opinion construing the terms of the Second Liberty Bond Act, we conclude that
    the term “interest” is unambiguous. As the Court and the Attorney General
    explained, the term “interest” in the Water Resources Development Act has its
    usual and customary meaning—i.e., the coupon rate of the obligation. The
    4
    The Court noted that, “[i]f there were doubt as to the connotation of the term, and another mean-
    ing might be adopted, the fact of its use in a tax statute would incline the scale to the construction most
    favorable to the taxpayer.” Id. at 561 (emphases added). The opinion makes clear, however, that the
    Court did not believe the term “interest” was ambiguous.
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    Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux
    conclusion that Congress intended this ordinary meaning when it used the term in
    connection with the Sioux Trusts is buttressed by the rule that “Congress is
    presumed to be aware of an administrative or judicial interpretation of a statute,”
    and to adopt that interpretation when it “adopts a new law incorporating sections
    of a prior law.” Lorillard v. Pons, 
    434 U.S. 575
    , 580, 581 (1978). Here, Congress
    has employed a term with a long-established judicial and administrative interpreta-
    tion, and there is nothing in the legislative history of the Act indicating that
    Congress intended the term to have a different meaning in section 604(c)(2).
    Accordingly, under the Act, the Secretary is required to invest the Sioux Trust
    fund monies in the obligations carrying the highest coupon rate, regardless of
    whether such investments offer the highest yield. To the extent that the Secretary
    has a fiduciary obligation to the Sioux tribes by virtue of the trust fund mecha-
    nism, this duty is defined by, and thus requires compliance with, the investment
    criteria set forth explicitly in the Act. Although investing in securities offering the
    highest yield might maximize the amount of income to the Funds, it is not what
    Congress instructed the Secretary to do. Cf. Pawnee v. United States, 
    830 F.2d 187
    , 191 (Ct. Cl. 1987) (no valid claim for breach of a fiduciary duty is stated
    where “the claim is simply that the Interior Department is compelled to go
    contrary to and beyond the [controlling] regulations and the leases in order to
    fulfill its alleged fiduciary obligation”).
    IV.
    Your second question is whether the universe of “available obligations” that
    must be considered in determining the obligations “carry[ing] the highest rate of
    interest” under section 604(c)(2) includes securities of government corporations
    and government-sponsored entities (“GSEs”) that have provisions in their charter
    statutes making their securities lawful investments for all federal trust funds,
    notwithstanding the provision in section 604(c)(1) of the Act limiting Sioux Trust
    investments to interest-bearing obligations of the United States or obligations
    guaranteed as to both principal and interest by the United States.
    The charter statutes of various government corporations and GSEs whose obli-
    gations are explicitly not guaranteed by the United States as to principal and
    interest include a provision similar or identical to the following:
    Obligations issued . . . shall be lawful investments and may be
    accepted as security for all fiduciary, trust, and public funds, the
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    investment or deposit of which shall be under the authority or control
    of any officer or agency of the Government of the United States. 5
    In accordance with several opinions of the Department of Justice, federal case law,
    and a Comptroller General opinion, we conclude that securities issued by entities
    whose charters include such “trust fund eligibility” language are appropriate
    investments for federal trust funds, even where those trust fund statutes specifical-
    ly limit the investment of funds to federal government obligations or obligations
    guaranteed by the United States.
    In 1996, our Office considered whether the Secretary of the Treasury could
    invest Civil Service Retirement and Disability Fund (“CSRDF”) monies in debt
    obligations issued by the United States Postal Service (“USPS”) and the Tennessee
    Valley Authority (“TVA”). Transactions Between the Federal Financing Bank
    and the Department of the Treasury, 
    20 Op. O.L.C. 64
     (1996) (“1996 Opinion”).
    The relevant statutes of the CSRDF trust fund and the GSEs were virtually
    identical to those at issue here. In what the 1996 Opinion termed “boilerplate”
    language governing the investment of government-managed trust funds, id. at 68,
    the CSRDF statute authorized the Secretary to invest in “interest-bearing obliga-
    tions of the United States, or obligations guaranteed as to both principal and
    interest by the United States.” 
    5 U.S.C. § 8348
    (e). 6 The USPS and TVA statutes
    indicated, as they do now, that their debt obligations were not guaranteed by the
    United States as to principal and interest, see 
    39 U.S.C. § 2005
    (d)(5); 16 U.S.C.
    § 831n-4(b), yet they were lawful for trust fund investments under the authority or
    control of any United States officer or agency, see 
    39 U.S.C. § 2005
    (d)(3); 16
    U.S.C. § 831n-4(d). Ultimately, we relied upon federal case law, “the longstanding
    practice and understanding of the Treasury and Justice Departments,” and a 1985
    Comptroller General opinion in determining the relationship between the boiler-
    plate trust investment instructions and the trust fund eligibility language of the
    government corporations and GSEs. 1996 Opinion, 20 Op. O.L.C. at 69. We
    concluded that the CSRDF monies could be invested in the USPS and TVA
    obligations. Id. at 68.
    5
    
    39 U.S.C. § 2005
    (d)(3) (investment eligibility provision for United States Postal Service obliga-
    tions). See also 16 U.S.C. § 831n-4(d) (investment eligibility provision for Tennessee Valley Authority
    bonds); 
    12 U.S.C. § 1452
    (g) (investment eligibility provision for Federal Home Loan Mortgage
    Corporation).
    6
    The relevant portion of the CSRDF statute states that the Secretary shall “invest in interest bearing
    securities of the United States such currently available portions of the Fund as are not immediately
    required for payments from the Fund.” 
    5 U.S.C. § 8348
    (c). It further directs that the Secretary purchase
    “public-debt obligations” with certain maturities, 
    id.
     § 8348(d), and specifies that the Secretary “may
    purchase other interest-bearing obligations of the United States, or obligations guaranteed as to both
    principal and interest by the United States . . . if he determines that the purchases are in the public
    interest,” id. § 8348(e).
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    Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux
    In the 1996 Opinion, we relied upon Manchester Band of Pomo Indians, Inc. v.
    United States, 
    363 F. Supp. 1238
    , 1244-45 (N.D. Cal. 1973), a federal district
    court opinion concluding that the TVA trust fund eligibility language, as well as
    the language in several other GSE charter statutes, rendered TVA obligations
    eligible for Indian trust fund investments, notwithstanding language in the
    particular Indian trust fund statute, 
    25 U.S.C. § 162
    (a), limiting investments to
    United States public debt obligations and other obligations guaranteed as to
    principal and interest by the United States. The court specifically noted that its
    conclusion regarding the effect of the broad trust fund eligibility language was “in
    accord with the intent of Congress.” 
    363 F. Supp. at 1245
    . The 1996 Opinion also
    cited two prior instances where the Department opined that trust fund eligibility
    language authorized investment in obligations of government corporations or
    GSEs where the specific trust fund statute at issue did not expressly authorize it.
    First, in a 1966 opinion concerning the obligations of federal land banks and banks
    for cooperatives which considered trust fund eligibility language different from
    that discussed here, our Office noted in passing that language identical to the TVA
    trust fund eligibility provision 7 “presents no problems of construction and plainly
    permits investments of the various Government trust funds in the affected
    securities whether or not the statutes creating the trust themselves do so.” Letter
    for Fred B. Smith, General Counsel, Department of the Treasury, from Frank M.
    Wozencraft, Assistant Attorney General, Office of Legal Counsel at 2 (Oct. 7,
    1966). Second, in a 1934 opinion by Attorney General Homer Cummings, the
    Department advised that government-managed postal savings funds could be
    invested in bonds issued under the Federal Farm Mortgage Corporation Act
    because of the Act’s trust fund eligibility language, even though the Postal Savings
    Act creating the trust fund only specified authority to invest in “bonds or other
    securities of the United States.” Investment of Postal Savings Funds in Bonds of
    Federal Farm Mortgage Corporation, 37 Op. Att’y Gen. 479, 480 (1934). In
    addition to these prior statements by the Department of Justice, the 1996 Opinion
    cited “Treasury’s longstanding practice to invest monies contained in government-
    managed trust funds . . . in public debt obligations or other obligations that have
    been authorized by Congress as legal investments for all government-managed
    trust funds,” 20 Op. O.L.C. at 70, as well as a 1985 Comptroller General opinion
    supporting the investment of CSRDF trust funds in Federal Financing Bank
    obligations which were not public debt obligations, but were eligible for federal
    trust fund investment pursuant to the Federal Financing Bank statute. 8
    7
    According to the 1996 Opinion, the language of the statute at issue provided: “‘[Obligations
    issued] shall be lawful investments and may be accepted as security, for all fiduciary, trust, and public
    funds the investment or deposit of which shall be under the authority or control of the United States or
    any officer or officers thereof.’” 20 Op. O.L.C. at 69 n.9 (quoting statute).
    8
    Memorandum for the Honorable John J. LaFalce, Chairman, Subcommittee on Economic Stabili-
    zation, House Committee on Banking, Finance, and Urban Affairs, from the Comptroller General of the
    75
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    Opinions of the Office of Legal Counsel in Volume 25
    Finally, in addition to relying upon the foregoing authority, the 1996 Opinion
    applied the principle of statutory construction dictating that statutes on the same
    subject should be read in harmony with one another, 2B Norman J. Singer,
    Sutherland on Statutes and Statutory Construction § 51.02, at 121-22 (5th ed.
    1992). Thus, the opinion concluded that
    [b]ecause the CSRDF statute’s investment provisions do not purport
    to supersede other statutes establishing that obligations issued there-
    under are eligible investments for government-managed trust funds
    and the relevant USPS and TVA statutes demonstrate Congress’s
    intention that obligations issued thereunder be eligible investments
    for all government-managed trust funds, the better interpretation is
    that the relevant USPS and TVA statutes have the effect of expand-
    ing the universe of authorized CSRDF investments.
    20 Op. O.L.C. at 69 n.7. 9
    The weight of this authority leads us to conclude that the obligations available
    for investment under the Water Resources Development Act must include
    obligations of those government corporations and GSEs whose charter statutes
    include the federal trust fund eligibility language. Federal case law, OLC opinions,
    and a Comptroller General opinion, as well as past practice, all indicate that the
    trust fund eligibility language found in GSE charter statutes is best read as
    expanding the universe of available obligations set forth in the “boilerplate”
    provisions of the statutes governing the investments of government-managed trust
    funds. Congress enacted the Sioux Trust provisions against this backdrop of
    federal law and governmental practice and, accordingly, we conclude that
    Congress intended to make government corporation and GSE obligations available
    for investment by the Secretary for these trusts. See Lorillard, 
    434 U.S. at 581
    (noting that it may be appropriate to presume Congress to be “aware of an
    administrative or judicial interpretation of a statute” when it “adopts a new law
    incorporating sections of a prior law”).
    United States (Oct. 30, 1985), reprinted in The Federal Financing Bank and the Debt Ceiling, Hearing
    Before the Subcomm. on Economic Stabilization of the House Comm. on Banking, Finance and Urban
    Affairs, 99th Cong. 31, 32 (1985). The opinions and legal interpretations of the General Accounting
    Office and the Comptroller General often provide helpful guidance on appropriations matters and
    related issues. However, they are not binding upon departments, agencies, or officers of the Executive
    Branch. See Bowsher v. Synar, 
    478 U.S. 714
    , 727-32 (1986).
    9
    While our 1996 Opinion mentions that the TVA and USPS statutes with the trust fund eligibility
    language were enacted several years after the CSRDF trust fund statute, 20 Op. O.L.C. at 67, that fact
    is neither mentioned nor relied upon by Manchester Band or the Department of Justice or Comptroller
    General authority discussed herein. Accordingly, we do not believe the temporal relationship between
    the two statutory schemes to be essential to our prior conclusion, and we interpret the reference in the
    1996 Opinion to be an additional point reinforcing the outcome.
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    Investment of Federal Trust Funds for Cheyenne River and Lower Brule Sioux
    For the reasons set forth above, we conclude that the Secretary, in fulfilling the
    government’s responsibilities to the Sioux tribes under the Act, must consider
    obligations of government corporations and GSEs whose charter statutes include
    trust fund eligibility language when determining which obligations carry the
    highest coupon rate of interest.
    JOSEPH R. GUERRA
    Deputy Assistant Attorney General
    Office of Legal Counsel
    77
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