c. On written demand by the department, or by the owner when he or she rents a dwelling unit or any time thereafter, the tenant shall submit an affidavit setting forth the names and relationship of all occupants residing within the dwelling unit and the ages of any minors. In the event of an increase in the number of occupants, the tenant shall advise the owner and, if the owner so demands in writing, the tenant shall submit an affidavit, setting forth the pertinent information regarding such increase in occupancy.
d. In any case where the birth of a child or its attainment of the age of four causes the number of persons or children to exceed the maximum occupancy permitted in this section, such excess occupancy shall be permissible until one year after such event.
e. In every rooming unit, a sign shall be posted showing the maximum lawful occupancy. Such sign shall be made and installed in the manner and location prescribed by the department and shall be maintained at all times.