No person shall occupy nor permit or let to be occupied any dwelling, dwelling unit or rooming unit for the purpose of living therein which does not comply with the following requirements.
(A) Permissible occupancy of dwelling unit. The maximum permissible occupancy of any dwelling unit or rooming unit shall be determined as follows:
(1) For the first occupant, 150 square feet of habitable room floor space, and for every additional occupant thereof, at least 100 square feet of habitable room floor space;
(2) In no event shall the total number of occupants exceed two times the number of habitable rooms, less kitchen.
(B) One family per dwelling unit. Not more than one family, except for temporary guests for 90 days or less, shall occupy a dwelling unit.
(`89 Code, § 27.260)