1724                           LAWS OF MARYLAND                      [CH. 815

counties, with such changes as they may deem appropriate, and shall
be effective from the date of adoption or from such other date as the
governing body may designate, provided that such adoption shall
not affect in any manner the administration of the regulations by the
commission or its functions under Section 70 hereof. In the event
the Commission prepares or has prepared regulations and amend-
ments, which it presents to the governing body of the applicable
county for appropriate action, and such body does not approve, modify
or reject said regulations and amendments within six (6) months
from the date of receipt thereof from the Commission, said regula-
tions and amendments shall be deemed approved and have the force
and effect of law. The regulations may provide for (1) the harmonious
development of the District; (2) the coordination of roads within
the subdivision with other existing, planned or platted roads or with
other features of the District or with the Commission's general plan
or with any road plan adopted or approved by the Commission as
part of the Commission's general plan; (3) adequate open spaces for
traffic, recreation, light, and air; BY DEDICATION OR OTHER-
WISE, AND THE DEDICATION TO PUBLIC USE OR CONVEY-
ANCE OF AREAS DESIGNATED FOR SUCH DEDICATION UN-
DER THE PROVISIONS OF ZONING REGULATIONS RELATING
TO AVERAGE LOT SIZE OR PLANNED COMMUNITY SUB-
DIVISION; (4) the reservation of lands for schools and other
public buildings and for parks, playgrounds, and other public
purposes, provided no reservation of land for traffic, recreation
or any other public purposes as herein provided shall continue
for longer than three (3) years [unless the public authority charged
with making provisions for traffic, recreation, school or other
public facilities shall have acquired the same or shall have instituted
proceedings to acquire the same within such period], without the
written approval of all persons holding or otherwise owning any legal
or equitable interest in said property; and provided further that dur-

ing the period of reservation of such property front foot benefit or

other improvement assessments levied, assessed or otherwise charge-

postponed for the period of time such property is in reservation;
and provided further that such properties so reserved for public use
as hereinbefore provided shall be exempt from all state, county and
local taxes during such period; (5) the conservation of or production
of adequate transportation, water, drainage and sanitary facilities;
(6) the preservation of the location of and the volume and flow of
water in and other characteristics of natural streams and other water-
ways; (7) the avoidance of population congestion; (8) the avoidance
of such scattered or premature subdivision of land as would involve
danger or injury to health, safety or welfare by reason of the lack of
water supply, drainage, transportation or other public services or
necessitate an excessive expenditure of public funds for the supply
of such services; (9) conformity of resubdivided lots to the character
of lots within the existing subdivision with respect to area, frontage
and alignment to existing lots and streets; or (10) (10) CONTROL
OF SUBDIVISION OR BUILDING (EXCEPT FOR AGRICUL-
TURAL OR RECREATIONAL PURPOSES) IN FLOOD PLAIN
AREAS OR STREAMS AND DRAINAGE COURSES, AND ON
UNSAFE LAND AREAS; (11) PRESERVATION OF OUTSTAND-
ING NATURAL OR CULTURAL FEATURES AND HISTORIC
SITES OR STRUCTURES; OR (12) other benefits to the health,