842 LAWS OF MARYLAND. [CH. 448

be redeemed within twenty (20) years from date of issue
by means of the seven (7c) cent tax provided for in Section 9
of this Act The Comptroller of the State of Maryland shall at
any time or times, upon the request of the Commission, calcu-
late and certify to the Commission the amount of such bonds
which may be issued within said limitation; and the certificate
of the Comptroller shall be final and binding authority to the
Commission as to such amounts. Said bonds shall be either
registered or coupon bonds in such denomination or denomina-
tions as shall be determined by the Commission and shall bear
interest at not exceeding five per cent, per annum, payable semi-
annually, and shall mature in not exceeding twenty years from
the date of issue and shall be forever exempt from State,
County and Municipal taxation. They shall be issued under
the hand and seal of said Commission and shall be guaran-
teed as to the payment of principal and interest in the fol-
lowing manner. In the event that the seven cent (7c)
tax provided for in Section 9 of this Act is levied and
collected throughout the District the said bonds shall be
guaranteed as to the payment of principal and interest by
the County Commissioners of both Montgomery and Prince
George's Counties, which guarantee shall be endorsed on each
of said bonds in the following language: "The payment of in-
terest when due and of the principal on maturity is guaranteed
by Montgomery and Prince George's Counties, Maryland";,
and such endorsement shall be signed on each of said bonds by
the president and secretary or the Clerk of the Board of County
Commissioners of each County within twenty days after the
bonds are presented by said Commission to them for endorse-
ment. In the event of any liability under the above guarantee,,
such liability for each County shall be in such proportion as the
assessable basis of that part of such County within the District
bears to the assessable basis of the whole of said District. In
the event that the seven cent (7c) tax provided for in Section 9
of this Act is levied and collected only throughout that portion
of the District within Montgomery County the said bonds shall
be guaranteed as to the payment of principal and interest by the
County Commissioners of Montgomery County, which guaran-
tee shall be endorsed on each of said bonds in the following
language: "The payment of interest when due and of the prin-
cipal on maturity is guaranteed by Montgomery County, Mary-
land"; and such endorsement shall be signed on each of said
bonds by the President and Clerk of the Board of County Com-
missioners of Montgomery County within twenty days after the