Sec. 2. A lock shall be installed on an outdoor capped access to a sewer located at a gas station and the capped access be kept locked at all times except when the facilities described in section 1 are in use.
Mich. Comp. Laws § 123.322, under ACCESS TO DISPOSAL FACILITIES.
Mich. Comp. Laws § 123.322
Sec. 2. A lock shall be installed on an outdoor capped access to a sewer located at a gas station and the capped access be kept locked at all times except when the facilities described in section 1 are in use.