1104 LAWS OF MARYLAND. [CH. 540

dorsed on each of said bonds in the following language: "The
payment of interest when due and the principal at maturity
is guaranteed by Montgomery and Prince George's Counties,
Maryland. " Such endorsement shall be signed on each of said
bonds by the President and Secretary or Clerk of the Board
of County Commissioners of each county, within twenty days
after the bonds are presented by said Commission to them for
endorsement. In the event of any liability under the above
guaranty, such liability for each county shall be in such pro-
portion as the assessable basis of that part of either county
within the Sanitary District bears to the assessable basis of
the whole of said District. Said Commission may in its dis-
cretion purchase and cancel the present outstanding bonds
issued by authority of Chapter 313 of the Acts of 1916 out of
the funds derived from any issue of bonds under this Act.

995. (1019) For the purpose of retiring the bonds and
notes authorized to be issued by this Act and the payment of
the interest thereon, there shall be levied against all the as-
sessable property within said Sanitary District, by the County
Commissioners of Montgomery and Prince George's Counties,
annually, so long as any of said bonds or notes are outstand-
ing and not paid, a tax sufficient to meet the interest on said
bonds and notes as it becomes due, and to pay the principal
thereof as they mature, said tax to be determined, levied,
collected and paid over in the following manner: At least
thirty days before the tax levying period of each year, the
respective County Commissioners shall certify to the Sani-
tary Commission the whole valuation of assessable property
within the Sanitary District. Said Sanitary Commission
shall then determine the amount necessary to be raised for
the ensuing year for the payment of interest on all outstand-
ing bonds and notes, the principal of all serial bonds and of
all notes maturing in said year and the proportionate part of
principal of all outstanding sinking fund bonds, the amount
to be paid on the principal of said sinking fund bonds in any
one year to be determined by the usual table of redemption
of bonds by annual deposit in a sinking fund on interest;
and after deducting all amounts in hand applicable to pay-
ment of interest and principal on said bonds and notes, as
hereinafter provided, it shall determine the number of cents
per $100 necessary to raise the said amount and shall so cer-
tify to each Board of County Commissioners. The said County
Commissioners in their next annual levy shall levy said tax
on all land and improvements and any other property assessed
for county tax purposes within said Sanitary District, which
tax shall be levied and collected as county taxes now are
or may be hereafter by law levied and collected, and have the
same priority rights, bear the same interest and penalties and