260 LAWS OF MARYLAND [CH. 131

ble to the payment of interest and retirement expenses, for
all the bonds issued, provided that in the event such sum
so levied shall not provide a sufficient sinking fund to re-
tire all such bonds as they mature, then the Commissioners
shall levy annually against all taxable property in Balti-
more County a sufficient sum to make up the deficiency.
The Treasurer of Baltimore County is hereby required to
collect the tax so levied, in the same manner as State and
county taxes are collected, and such tax shall bear the
same interest and be subject to the same penalties in the
event of non-payment, as in the case of other county taxes.
From the money so received, together with the amount in
hand to the credit of said bond fund from the collections
provided for in Section 335, the Commissioners shall first
pay all interest on said bonds as it matures, and shall then
deposit in some bank, or banks in Baltimore County to the
credit of the Commissioners, as a fund to be known as
the "Sinking Fund Account", the amount so raised for the
payment of the principal of said bonds. The monies in
the Sinking Fund shall be kept entirely separate from all
other monies of the said Commissioners and of the County,
and the said Commissioners shall invest the monies in the
Sinking Fund in the purchase of any bonds issued under
this Act when they are obtainable at not exceeding one
point above the issue price or in bonds of the United States
Government or of the State of Maryland; and bonds issued
under this Act when purchased for the Sinking Fund shall
not be cancelled and destroyed, but shall be immediately
stamped to show that they belong to the Sinking Fund and
shall be held and treated as other outstanding bonds bear-
ing interest, and the interest thereon shall be paid into the
Sinking Fund until their maturity and at maturity they
shall be cancelled at the same time at which bonds of the
same series outstanding in the hands of the public are paid.
The Commissioners shall have power and authority to sell
any United States or State of Maryland bonds at any time
in the Sinking Fund in order to provide cash to pay any
series of bonds issued under this Act as they mature or to
purchase with the proceeds bonds issued under this Act
whenever the Commissioners can in their judgment make
such a change of investment advantageously. The pro-
visions of this section shall not apply to the properties,
plants, franchise, and/or right of the Mayor and City
Council of Baltimore or to any properties, plants, fran-
chise and/or rights that may be hereafter acquired by the
Mayor and City Council of Baltimore for the protection or
enlargement of its water supply, sewerage, storm water