WM. PRESTON LANE, JR., GOVERNOR. 1807

costs. The County Commissioners of Prince George's
County are directed to levy annually upon all of the
property assessed for county tax purposes within the portion
of said Sanitary District in Prince George's County upon the
certification of the Washington Suburban Sanitary Commis-
sion, an ad valorem tax at a rate necessary to produce
annually the sum required to pay the balance of the annual
maintenance and operation costs of said flood control and
navigation projects. Should there be a surplus from the
charges for the use of said facilities after maintenance and
operation costs have been paid, the surplus shall be returned
to the County Commissioners of Prince George's County, The
Maryland National Capital Park and Planning Commission
and the Washington Suburban Sanitary Commission in pro-
portion to the capital costs contributed by each agency. Said
surplus shall be applied toward payment of the principal
and interest of said outstanding bonds.

(f) The Maryland National Capital Park and Planning Com-
mission shall have the right to use the lands acquired for
said flood control and navigation projects for park purposes
so long as such use does not interfere with the construction,
maintenance and operation of said flood control and naviga-
tion projects, and shall control and operate recreational facili-
ties within said projects.

SEC. 2. And be it further enacted, That the Washington
Suburban Sanitary Commission shall not approve any plan,
nor enter into any contract or agreement which is inconsistent
with the purposes of the Capper-Cramton Act, Public Law
No. 284, 71st Congress, as amended, or is inconsistent with
any agreement between The National Capital Park and Plan-
ning Commission and The Maryland National Capital Park
and Planning Commission related to the park and parkway
system, authorized by said Act.

All bonds authorized to be issued under this Act shall be
so issued in accordance with the provisions of Sections 35
and 36 of Article 31, Code of Public General Laws of Mary-
land (1939 Edition), except that limitations on the maximum
maturities of public securities of said Article 31 shall be in-
applicable to the bonds authorized to be issued tinder this
Act. All the bonds authorized to be issued under this Act
and the interest payable thereon in the hands of person or
persons entitled thereto from time to time shall be and re-
main forever exempt from taxation of any kind or nature
whatsoever by the State of Maryland or by any county, muni-
cipality, or other political sub-division thereof.