Municipal improvements in streets; buildings not on mapped streets

A. Except in streets existing and established by law as public streets at the date of the establishment of the official map, no public water facilities, sewer, or other public utilities or improvements shall be constructed after such date in any street until such street is duly placed on the official map. B. The town council and the police jury may provide by ordinance that no permit for the erection of any building shall be issued unless a street giving access to such proposed building existed and was established by law as a public street at the time of the establishment of the official map or shall have been duly placed on the official map in accordance with the provisions of R.S. 33:140.50.24 and 140.50.25; provided, however, that such ordinance shall contain provision whereby the applicant for such permit may appeal to the board of adjustment, hearing upon which appeal and notice of the time and place of which shall be published in a newspaper of general circulation in the city and parish, and such board shall have the authority to authorize such a permit, subject to such conditions as the board may impose, where the circumstances of the case do not require the proposed building to be related to the existing streets or to streets as shown on the official map and where the permit would not tend to distort or increase the difficulty of carrying out the official map of the master plan of the municipality.