ZONING AND PLANNING. 879

construction, reconstruction, alteration, repair or use of buildings, struc-
tures or land. All such regulations shall be uniform for each class or
kind of building throughout each district, but the regulations in one
district may differ from those in other districts.

(c) Purposes in View. Such regulations shall be made in accordance
with a comprehensive plan and designed to lessen congestion in the streets;
to secure safety from fire, panic and other dangers; to promote health and
the general welfare; to provide adequate light and air; to prevent the
overcrowding of land; to avoid undue concentration of population; to
facilitate the adequate provision of transportation, water, sewerage,
schools, parks and other public requirements. Such regulations shall be
made with reasonable consideration, among other things, to the character
of the district and its peculiar suitability for particular uses, and with a
view to conserving the value of buildings and encouraging the most ap-
propriate use of land throughout such municipality.

(d) Method of Procedure. The council shall provide for the manner
in which such regulations and restrictions and the boundaries of such
districts shall be determined, established and enforced, and from time to
time amended, supplemented or changed. However, no such regulation,
restriction or boundary shall become effective until after a public hearing
in relation thereto, at which parties in interest and citizens shall have an
opportunity to be heard. At least fifteen (15) days' notice of the time
and place of such hearing shall be published in an official paper or a paper
of general circulation in such municipality.

(e) Changes. Such regulations, restrictions and boundaries may from
time to time be amended, supplanted, changed, modified or repealed. In
case, however, of a protest against such change signed by the owners of
twenty per cent. (20%) or more either of the area of the lots included in
such proposed change or of those immediately adjacent in the rear thereof
extending 175 feet therefrom, or of those directly opposite thereto extend-
ing 175 feet from the street frontage of such opposite lots, such amend-
ment shall not become effective except by the favorable vote of three-
fourths of all the members of the legislative body of such municipality.
The provisions of the previous section relative to public hearings and
official notice shall apply equally to all changes or amendments.

(f) In order that the municipality may avail itself of the zoning
powers conferred by this sub-title, it shall be the duty of the Planning
Commission to recommend the boundaries of the various original districts
and appropriate regulations to be enforced therein. Such Commission
shall make a preliminary report and hold public hearings thereon before
submitting its final report and the council shall not hold its public hear-
ings or take action until it has received the final report of such commission.
See sec. 5.

1933, ch. 599, sec. 13.

22. Board of Appeals. The council shall provide for the appointment
of a Board of Appeals, and in the regulations and restrictions adopted