FREDERICK COUNTY. 2613

ance shall be paid in three equal annual installments, such deferred pay-
ments to bear interest at the rate of 6 per cent, and to be payable at the
same time, in the same manner, and subject to the same penalties, and
methods of collection, as the front foot benefit charges provided under Sec-
tion 248. One-half of the revenue, above actual cost, derived from such
charges shall be retained by the Mayor and Council of Mt. Airy and as a
contingent fund for repairs, replacements or any extraordinary expense
in the maintenance and operation of the water supply system under its con-
trol. The remaining half shall be applied by the Mayor and Council of Mt.
Airy to the payment of the bonded debt, as hereinafter provided.

1924, ch. 126, sec. 11.

599. All sums collected by the Mayor and Council of Mt. Airy for
benefits levied against property for water supply construction, and half
of all sums collected by the Mayor and Council of Mt. Airy for water
connections, as provided in Section 251, shall be set aside as a separate
fund to be known and designated as the "Current Interest and Sinking
Fund," if sinking fund bonds are used, and "Current Bond Fund," if
serial bonds are used, from which fund interest shall be paid on all out-
standing bonds, and the balance, if any, transferred to the "Water Supply
Sinking Fund Account," if sinking fund bonds are used, or to the "Water
Supply Bond Account," if serial bonds are used, as provided under Sec-
tion 246. The Mayor and Council of Mt. Airy, in order to determine
the amount necessary to be levied under Section 246, shall deduct the
amount of its credit in said "Current Interest and Sinking Fund," if
sinking fund bonds are used, or in said "Water Supply Bond Account,"
if serial bonds are used, from the whole amount necessary to be raised in
any one year for interest and sinking fund on outstanding bonds, if sink-
ing fund bonds are used, or for interest and principal on outstanding-
bonds, if serial bonds are used, and the balance remaining to be raised
shall be the amount to be collected by taxation as provided under Sec-
tion 246.

1924, ch. 126, sec. 12.

600. For the purpose of providing funds for maintaining, repairing,
and operating their water supply system, including overhead expenses
and property depreciation allowance, said Mayor and Council of Mt. Airy
shall be empowered and directed to make such service rates as it may
deem necessary, chargeable against all properties having a connection
with any water main under its ownership. Said rates shall be uniform
throughout the town of Mt. Airy, but subject to change from time to time,
as necessary. The rates for service shall consist of a minimum or ready-
to-serve charge which shall be based upon the size of the meter on the
water connection leading to the property, and of a charge for water used,
which shall be based upon the amount of water passing the meter during
the period between the last two readings, said meter being required to be
placed on each water connection by, and at the sole expense of the Mayor