(a) The outside of the cylinder enclosure housing liquefied petroleum gas cylinders, valves and regulators shall be marked as follows:
Liquefied Petroleum Gas
Keep Open Fires Away.
Operating Instructions
Inside and In__________________________________________________________
(b) A durable and permanently legible instruction sign covering safe operation and maintenance of the gas-consuming appliance shall be installed adjacent to the appliance.
(c) ``Operating Instructions'' as listed in Sec. 58.16-30 shall be framed under glass, or other equivalent, clear, transparent material, in plainly visible locations on the outside of the metal enclosure and near the most frequently used gas-consuming appliance, so they may be easily read.
Subpart 58.20_Refrigeration Machinery