(1) There shall be prominently posted at all self-service laundries the name, address and telephone number of the owner or operator of the laundry, and there shall be a public telephone on the premises in a conspicuous location.
(2) Any dryer located on the premises for use in connection with such laundries shall be so constructed that it may be opened from the inside as well as from the outside.
(3) No person shall:
(a) operate a self-service laundry during the hours of 1:00 A.M. and 6:00 A.M.;
(b) permit lights outside of the laundry premises to remain lighted after 12:00 o'clock midnight;
(c) use more than 2,500 square feet of gross floor area of any particular premises for the operation of a self-service laundry.