Section 12-815 - Warning signs in case of fire(a) Each passenger elevator in a permanent installation used by the public shall have a sign that reads "Warning - Elevators shall not be used in event of fire - Use marked exit stairways".(b) The sign described in subsection (a) of this section shall be posted: (1) at the entrance to the elevator shaft on each floor; and(2) directly above the call button.(c) A sign similar to the sign described in subsection (a) of this section shall be posted within the elevator car.(d)(1) The top of each sign may not be more than 6 feet above the floor.(2) The lettering in the word "warning" shall be at least three-eighths inch high and the rest of the lettering shall be at least one-fourth inch high.