31 U.S.C. § 1537 — Services between the United States Gov-

Page 200 TITLE 31—MONEY AND FINANCE § 1537 supplies, or equipment, or in performing the work or services’’ to eliminate unnecessary words. § 1537. Services between the United States Gov- ernment and the District of Columbia gov- ernment (a) To prevent duplication and to promote effi- ciency and economy, an officer or employee of— (1) the United States Government may pro- vide services to the District of Columbia gov- ernment; and (2) the District of Columbia government may provide services to the United States Govern- ment. (b)(1) Services under this section shall be pro- vided under an agreement— (A) negotiated by officers and employees of the 2 governments; and (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 pro- vided 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 Gov- ernment may be paid from appropriations available to the District of Columbia govern- ment officer or employee to whom the services were provided; and (2) costs incurred by the District of Colum- bia government may be paid from amounts available to the United States Government of- ficer 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 Serv- ice and the Secret Service Uniformed Division on a non-reimbursable basis in carrying out their protective duties under sections 3056 and 3056A of title 18. (Pub. L. 97–258, Sept. 13, 1982, 96 Stat. 934; Pub. L. 109–177, title VI, § 605(d)(1), Mar. 9, 2006, 120 Stat. 255.) HISTORICAL AND REVISION NOTES Revised Section Source (U.S. Code) Source (Statutes at Large) 1537(a) ..... 31:685a(a)(1st sen- tence). Dec. 24, 1973, Pub. L. 93–198, § 731, 87 Stat. 822. 1537(b) ..... 31:685a(a)(2d, last sentences), (b). 1537(c) ..... 31:685a(c)(less last sentence words after last comma). HISTORICAL AND REVISION NOTES—CONTINUED Revised Section Source (U.S. Code) Source (Statutes at Large) 1537(d) ..... 31:685a(c)(last sen- tence words after last comma). In the section, the words ‘‘District of Columbia’’ are substituted for ‘‘District’’ for clarity and consistency. In subsection (a), the word ‘‘duplication’’ is sub- stituted for ‘‘duplication of effort’’ to eliminate unnec- essary words. The words ‘‘officer or employee of the United States Government’’ are substituted for ‘‘any Federal officer or agency’’, and the words ‘‘officer or employee of the District of Columbia government’’ are substituted for ‘‘any District officer or agency’’, for consistency. In subsection (b)(1), before clause (A), the words ‘‘Ex- cept where the terms and conditions governing the fur- nishing of such services are prescribed by other provi- sions of law’’ are omitted as surplus. In clause (A), the words ‘‘officers and employees of the 2 governments’’ are substituted for ‘‘Federal and District authorities’’ for consistency. In clause (B), the words ‘‘of the Dis- trict of Columbia’’ are added for clarity. In subsection (b)(3), before clause (A), the words ‘‘du- ties and powers’’ are substituted for ‘‘functions’’ for consistency in the revised title and with other titles of the United States Code. The text of 31:685a(b)(last sen- tence) is omitted as surplus. In subsection (c)(1), the words ‘‘United States Gov- ernment’’ are substituted for ‘‘each Federal officer and agency’’ for clarity. In subsection (c)(2), the words ‘‘District of Columbia government’’ are substituted for ‘‘each District officer and agency’’ for consistency. Editorial Notes AMENDMENTS 2006—Subsec. (d). Pub. L. 109–177 substituted ‘‘and the Secret Service Uniformed Division’’ for ‘‘and the Exec- utive Protective Service’’ and ‘‘their protective duties under sections 3056 and 3056A of title 18’’ for ‘‘their pro- tective duties under section 302 of title 3 and section 3056 of title 18’’. Statutory Notes and Related Subsidiaries TRANSFER OF FUNCTIONS For transfer of the functions, personnel, assets, and obligations of the United States Secret Service, includ- ing the functions of the Secretary of the Treasury re- lating thereto, to the Secretary of Homeland Security, and for treatment of related references, see sections 381, 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganiza- tion Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6. SUBCHAPTER IV—CLOSING ACCOUNTS § 1551. Definitions; applicability of subchapter (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. (3) A fixed appropriation account is an ap- propriation account available for obligation for a definite period. (b) The limitations on the availability for ex- penditure prescribed in this subchapter apply to