530 LAWS OF MARYLAND. [CH. 330

upon, naming also in said notice a time and place, when and
at which time said owner will be heard.

Such notice may be mailed to the last known address of the
owner, or served in person upon any adult occupying the
premises or in case of a vacant or unimproved property
posted upon the premises. The classification of and the bene-
fit assessed against any property as made by the Commission
shall be final, subject only to revision at said hearing.

The Commission may change the classification of property
from time to time as said properties change in the uses to
which they are put.

Said benefits shall be levied for both water supply and
sewerage construction and shall be based for each class of
property upon the number of front feet abutting upon the
street, lane, road, alley or right-of-way in which the water
pipe or sewer is placed; provided, however, that in the case
of any irregular shaped lot abutting upon a road, street, lane,
alley or right-of-way in which there is or is being constructed
a water main or sewer at any point, said lot shall be assessed
for such frontage as the Commission may determine to be
reasonable and fair; and provided further that no lot in a
subdivision property shall be assessed on more than one side,
unless said lot abuts upon two streets, that corner lots, ir-
regular lots and water front lots may be averaged and
assessed upon such frontage as the Commission may deem
reasonable and fair, and that all lots in this class shall be
assessed even though a water main or sewer may not extend
along the full length of any boundary. Industrial or business
property may be assessed on more than one side; provided
that the additional side being used for a separate and dis-
tinct industrial or business enterprise.

And provided further, that no land so classified as agricul-
tural, large tracts of land, swamp lands, low lands, public
parks, cemeteries, race tracks, ball parks and other athletic
fields, by this Commission shall be assessed a front foot
benefit when such land has constructed through it or in front
of it a sewer or water main, until such time as a water or
sewer connection is made, and when so made and for every
connection such land shall become liable for a front foot as-
sessment for such reasonable frontage not exceeding three
hundred feet, as may be determined by said Commission, and
shall immediately be assessed at the rate of assessment deter-
mined by said Commission for such land; and provided
further, that no land so classified as airport property by this
Commission shall be assessed a front foot benefit when such
land has constructed through it or in front of it a sewer or
water main, until such time as a water or sewer connection