Section 14-103d-2 - Operation or parking of motor vehicles fueled by pressurized gases(a) No motor vehicle using pressurized flammable gas as fuel for its engine shall enter or remain in, whether attended or unattended, any parking garage or other area within this state which is below grade level. For the purposes of this regulation an area shall be deemed to be below grade level when one or more sides at least in part is below the highest ground level surrounding an area enclosed by three or more sides.(b)Notice of prohibition. Each area used for parking five or more motor vehicles, or for the operation or repair of motor vehicles which is below grade level as defined in subsection (a), whether it is open to the general public or not, shall have posted in a conspicuous place near the grade level entrance to such area, a notice of the prohibition stated in subsection (a). Such notice shall be of sufficient size and contrast with its background if any, to be easily read by the operator of a motor vehicle approaching the entrance.Conn. Agencies Regs. § 14-103d-2