(a)      The Mayor and City Council of Baltimore shall provide for the manner in which regulations, restrictions, and the boundaries of districts shall be determined, established, enforced, and periodically amended.

      (b)      (1)      A regulation, restriction, or boundary may not become effective until after at least one public hearing is held at which parties in interest and citizens have an opportunity to be heard.

            (2)      (i)      At least 15 days before a public hearing is held under this section, the Mayor and City Council of Baltimore shall publish notice of the time and place of the hearing in an official paper or a paper of general circulation in Baltimore City.

                  (ii)      If the hearing will be on a proposed change in the boundaries of a zoning district, the Mayor and City Council of Baltimore shall:

                        1.      Post a similar notice at a place or at places designated by the respective zoning authorities within the zone proposed to be changed; and

                        2.      Mail notice of the proposed change by first class United States mail to any person whose name last appeared in the tax records of Baltimore City as the owner of the property proposed to be changed.