PUBLIC LAW 97-258—SEPT. 13, 1982 (B) approved by the Director of the Office of Management and Budget and the Mayor of the District of Columbia. (2) Each agreement shall provide that the cost of providing the services shall be borne in the way provided in subsection (c) of this section by the government to which the services are provided at rates or charges based on the actual cost of providing the services. (3) To carry out an agreement made under this subsection, the agreement may provide for the delegation of duties and powers of officers and employees of— (A) the District of Columbia government to officers and employees of the United States Government; and (B) the United States Government to officers and employees of the District of Columbia government. (c) In providing services under an agreement made under subsection (b) of this section— (1) costs incurred by the United States Government may be paid from appropriations available to the District of Columbia government officer or employee to whom the services were provided; and (2) costs incurred by the District of Columbia government may be paid from amounts available to the United States Government officer or employee to whom the services were provided. (d) When requested by the Director of the United States Secret Service, the Chief of the Metropolitan Police shall assist the Secret Service and the Executive Protective Service on a non-reimbursable basis in carrying out their protective duties under section 302 of title 3 and section 3056 of title 18. SUBCHAPTER IV-CLOSING ACCOUNTS § 1551. DeHnitions and application (a) In this subchapter— (1) an obligated balance of an appropriation account as of the end of a fiscal year is the amount of unliquidated obligations applicable to the appropriation less amounts collectible as repayments to the appropriation. (2) an unobligated balance is the difference between the obligated balance and the total unexpended balance. (b) This subchapter does not apply to— (1) appropriations for the District of Columbia government; or (2) appropriations to be disbursed by the Secretary of the Senate or the Clerk of the House of Representatives. § 1552. Procedure for appropriation accounts available for deHnite periods (a) Each appropriation account available for obligation for a definite period is closed as follows: (1) The obligated balance is transferred on September 30th of the 2d fiscal year after the period of availability ends to an appropriation account of the agency responsible for paying the obligation. Amounts transferred from all appropriation accounts for the same general purpose are merged in the account for paying obligations. (2) The unobligated balance is withdrawn at the end of the period of availability for obligation and reverts to the Treasury or, if derived only from a special or trust fund and not otherwise
96 STAT. 935
3 USC 302.
18 USC 305(5.
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