73 S T A T. ]
237
PUBLIC LAW 86-104-JULY 23, 1959
struction on aeration plant and secondary sedimentation tanks, reconstruction, enlargement, rehabilitation, major repair and replacement of grit removal, sludge digestion, heating and other existing equipment and facilities; rehabilitation and replacement of screening and flow control facilities at the main sewerage pumping station; laying water mains and sewers in advance of paving and installing fire and public hydrants; constructing trunk water mains; to remain available until expended, $10,215,000, of which $2,500,000 shall not become available for expenditure until July 1, 1960, and $2,300,000 shall be payable from the sanitary sewage works fund: Provided, That this appropriation and the appropriation "Operating expenses. Department of Sanitary Engineering" shall be available for the employment of engineering or other professional services by contract or otherwise, and for engineering and incidental expenses. CAPITAL OUTLAY, WASHINGTON AQUEDUCT
For continuing construction of Dalecarlia filter and chemical buildings; miscellaneous betterments, replacements, and engineering planning of water supplj^ f acilitieSj including continuing raw-water conduit rehabilitation, utility relocations, and plant system rearrangements and interconnections; acquisition by gift, exchange, purchase, or condemnation of supplementary land; and for developing increased water supply for the District of Columbia and environs in accordance with House Document 480, Seventy-ninth Congress, second session; and necessary expenses incident thereto; including services as authorized by section 15 of the Act of August 2, 1946 (5 U.S.C. 55a), but at rates for individual consultants not in excess of $100 per diem; to remain available until expended, $3,500,000 (payable from water fund).
60 Stat. 810.
CAPITAL OUTLAY, MOTOR VEHICLE PARKING AGENCY
For acquisition of sites, grading, surfacing, and erection of structures incident to the construction of off-street parking facilities; widening and channelizing streets in the vicinity of off-street parking facilities and to relieve traffic congestion caused by a lack of parking facilities; to remain available until expended, $125,000 (payable from motor vehicle parking fund). GENERAL PROVISIONS SEC. 2. Except as otherwise provided herein, all vouchers covering expenditures of appropriations contained in this Act shall be audited before payment by the designated certifying official and the vouchers as approved shall be paid by checks issued by the designated disbursing official without countersignature. SEC. 3. Whenever in this Act an amount is specified within an appropriation for particular purposes or object of expenditure, such amount, unless otherwise specified, shall be considered as the maximum amount which may be expended for said purpose or object rather than an amount set apart exclusively therefor. SEC. 4. Appropriations in this Act shall be available, when authorized or approved by the Commissioners, for allowances for privately owned automobiles used for the performance of official duties at 8 cents per mile but not to exceed $25 a month for each automobile, unless otherwise therein specifically provided, except that fifty-two suph allowances at not more than $410 each per annum may be authorized or approved by the Commissioners.
Vouchers.
Maximum amount.
A u to m o b i l e alio ^vances.
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