990 LAWS OF MARYLAND [CH. 522

portion of said Sanitary District in Prince George's County,
upon the certification of the Washington Suburban Sanitary
Commission, an ad valorem tax at a rate necessary to pro-
duce annually the sum required to pay the principal and
interest for the current year on said bonds or any part
thereof outstanding, which tax shall be levied and collected
as other Commission ad valorem taxes are levied and
collected and paid to said Commission.

(3) The Maryland National Capital Park and Planning
Commission is authorized AND DIRECTED to issue its
bonds in an amount not exceeding [$250, 000] $500, 000, in
such denominations and for such terms, not exceeding forty
years, and at such rate, not exceeding four per cent (4%),
as it may determine, such bonds shall be issued on the full
faith and credit of the Maryland National Capital Park and
Planning Commission and guaranteed as to both principal
and interest by the County Commissioners of Prince
George's County only; the County Commissioners of Prince
George's County are hereby authorized and directed to
guarantee said bonds in substantially the manner and form
of the guarantee of the construction bonds of said Commis-
sion. Such guarantee shall operate as a pledge of the full
faith and credit of the County Commissioners of Prince
George's County to the payment of the maturing principal
and interest of said bonds and, to the extent that the taxes
hereinafter in this sub-section provided for are inadequate
to provide the funds necessary to pay such principal and
interest in any year, said County Commissioners shall levy
upon all property subject to taxation within its corporate
limits ad valorem taxes in rate and amount sufficient to
make up any such deficiency. For the purpose of paying
the principal of said bonds as they mature and the interest
thereon the County Commissioners of Prince George's
County are directed to levy annually upon all of the prop-
erty assessed for county tax purposes within the portion
of the Maryland Washington Metropolitan District in
Prince George's County, upon the certification of the Mary-
land National Capital Park and Planning Commission, an
ad valorem tax at a rate necessary to produce annually the
sum required to pay the principal and interest for the
current year on said bonds or any part thereof outstanding,
which tax shall be levied and collected as other Commission
ad valorem taxes are levied and collected and paid to said
Commission.

(C) WHENEVER AN APPROPRIATION SHALL
HAVE BEEN MADE BY THE UNITED STATES OF