THEODORE R. MCKELDIN, GOVERNOR 1309

operating its sewerage system and all or any part of the
principal of and interest on revenue bonds issued on ac-
count of such sewerage system, and to pledge any surplus
revenues of its water system, subject to prior pledges
thereof, for such purpose or purposes. Rates, fees and
charges for the services of a sewerage system may be based
or computed either upon the quantity of water used or
upon the amount of the water bill or upon the number and
size of sewer connections or upon the number and kind of
plumbing fixtures in use in the premises connected with
the sewerage system or upon the number or average num-
ber of persons residing or working in or otherwise con-
nected with such premises or upon the type or character of
such premises or upon any other factor affecting the use
of the facilities furnished or upon any combination of the
foregoing factors. Charges for sewerage services to prem-
ises obtaining all or a part of their water supply from
sources other than a public water system may be deter-
mined by gauging or metering or in any other manner ap-
proved by the Authority. All other rates, fees and charges
of the Authority shall be based or computed upon such
factor or factors as the Authority shall deem reasonable
and proper.

In cases where the character of the sewage or waste
from any manufacturing, commercial or industrial plant,
building or premises is such that it imposes an unreason-
able burden upon any sewerage system, an additional
charge may be made therefor, or the Authority may, if it
deems advisable, compel such manufacturing, commercial
or industrial plant, building or premises to treat such
sewage or waste in such manner as shall be specified by
the Authority before discharging such sewage or waste
into any sewerage system owned, operated or maintained
by such Authority.

Every municipality composing an Authority operating
a sewerage system is hereby authorized and required, at
the request of such Authority, to supply to such Authority,
on or before the fifteenth day of the month following the
month during which water bills are issued by such mu-
nicipality, a list of all water meter readings forming the
basis of such bills and/or a statement of the amount of
such bills so that such data may be used by such Authority
in calculating or computing its rates, fees and charges for
sewer services to such water consumer.

410L. In the discretion of the Authority, any revenue
bonds issued under the provisions of this sub-title may be
secured by a trust agreement by and between the Author-