(a) All exterior accessible openings of any building used for business subject to the provision hereof and which are not otherwise protected by approved photoelectric, ultrasonic or other intrusion detection devices, shall be secured as herein provided.
(b) Provided, however, exit doors serving an occupant load of more than ten and serving hazardous rooms or areas shall be openable from the inside without the use of a key or any special knowledge or effort; and any additional locking device on such doors shall be required only after the approval of the Fire Marshal has been first had and obtained.
(1958 Code, § 40.06) (Ord. 67-71, passed 12-28-1967; Ord. 2002-1, passed 1-14-2002)