8. (a) A class A multiple dwelling is a multiple dwelling that is occupied for permanent residence purposes. This class shall include tenements, flat houses, maisonette apartments, apartment houses, apartment hotels, bachelor apartments, studio apartments, duplex apartments, kitchenette apartments, garden-type maisonette dwelling projects, and all other multiple dwellings except class B multiple dwellings. A class A multiple dwelling shall only be used for permanent residence purposes. For the purposes of this subparagraph, "permanent residence purposes" shall consist of occupancy of a dwelling unit by the same natural person or family for thirty consecutive days or more, and a natural person or family so occupying a dwelling unit shall be referred to herein as the permanent occupants of such dwelling unit. The following uses of a dwelling unit by the permanent occupants thereof shall not be deemed to be inconsistent with occupancy of such dwelling unit for permanent residence purposes:
(1) (A) occupancy of such dwelling unit for fewer than thirty consecutive days by other natural persons living within the household of the permanent occupant such as house guests or lawful boarders, roomers or lodgers; or
(B) incidental and occasional occupancy of such dwelling unit for fewer than thirty consecutive days by other natural persons when the permanent occupants are temporarily absent for personal reasons such as vacation or medical treatment, provided that there is no monetary compensation paid to the permanent occupants for such occupancy.