808
PUBLIC LAW 93-198-DEC. 24, 1973
[87 STAT.
tions are authorized by paragraph seven of section 5136 of the Revised Statutes (12 LT.S.C 24), to deal in, underwrite, purchase and sell obligations of the United States, States, or political subdivisions thereof. AH Federal building and loan associations and Federal savings and loan associations; and banks, trust companies, building and loan associations, and savings and loan associations, domiciled in the District, may purchase, sell, underwrite, and deal in, for their own account or for the account of others, all bonds or notes issued pursuant to this title. Nothing contained in this section shall be construed as relieving any person, firm, association, or corporation from any duty of exercising due and reasonable care in selecting securities for purchase or investment. WATER
POLLUTION
SEC. 487. (a) The Mayor shall annually estimate the amount of the District's principal and interest expense which is required to service District obligations attributable to the Maryland and Virginia pro rata share of District sanitary sewage water works and other water pollution projects which provide service to the local jurisdictions in those States. Such amounts as determined by the Mayor pursuant to the agreements described in subsection (b) shall be used to exclude the Maryland and Virginia share of pollution projects cost from the limitation on the District's capital project obligations as provided in section 603(b). (b) The Mayor shall enter into agreements with the States and local jurisdictions concerned for annual payments to the District of rates and charges for waste treatment services in accordance with the use and benefits made and derived from the operation of the said waste treatment facilities. Each such agreement shall require that the estimated amount of such rates and charges will be paid in advance, subject to adjustment after each year. Such rates and charges shall be sufficient to cover the cost of construction, interest on capital, operation and maintenance, and the necessary replacement of equipment during the useful life of the facility. COST OF RESERVOIRS ON POTOMAC RIVER
Contract au-
thority
gj.^,^ 488. (a) The ]\layor is authorized to contract with the United States, any State in the Potomac River Basin, any agency or political subdivision thereof, and any other competent State or local authority, with respect to the payment by the District to the United States, either directly or indirectly, of the District's equitable share of any part or parts of the non-Federal portion of the costs of any reservoirs authorized by the Congress for construction on the Potomac River or any of its tributaries. Every such contract may contain such provisions as the Mayor may deem necessary or appropriate. (b) Unless hereafter otherwise provided by legislation enacted by the Ooimcil. all payments made by the District and all moneys received by the District pursuant to any contract made under the authority of this Act shall be paid from, or be deposited in,, a fund designated by the Mayor. Charges for water delivered from the District water system for use outside the District may be adjusted to reflect the portions of any payments made by the District under contracts authorized by this Act which are equitably attributable to such use outside the District. DIS'IRICT'S
CONTRIBITTIONS TO THE W A S H I N G TO N TRANSIT AUTHORITY
METROPOLITAN
AREA
SEC. 489. Notwithstanding any provision of law to the contrary, beginning with fiscal year 1976 the District share of the cost of the
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