56. Safety relief valves and devices shall be inspected and tested prior to being put into service and shall be tested periodically as prescribed in the Compressed Gas Association Pamphlet Safety Relief Device Standards for Compressed Gas Storage Containers.

• 57. (1) The tank car, during loading and unloading operations, shall be protected on the connected end or ends of the siding by a sign of metal or other suitable material 12 inches by 15 inches in size and reading “STOP — TANK CAR CONNECTED”. The word “stop” shall be in letters at least 4 inches high and the other words in letters at least 2 inches high. Letters shall be white on a blue background.

• (2) The “Stop” sign shall be placed on the tank car or on the loading or unloading track in a manner that will ensure it is always visible to the crew of an engine on the same track.

• 58. (1) During loading or unloading operations, tank car hand brakes shall be kept applied and the wheels at both ends of the tank car shall be blocked.

• (2) Tank cars shall be disconnected from pipelines immediately after the completion of loading or unloading operations.

• (3) At least one experienced operator supplied by the consignee or the consignor, as the case may be, shall supervise the loading or unloading operation.  During the absence of the operator supervising the loading or unloading operation from the installation site, operations shall be discontinued.

• (4) Gas or liquid shall not be vented to the atmosphere to assist in transferring the contents of one container to another.

• (5) Loading or unloading operations shall only be carried out during the hours of daylight unless adequate permanent lighting installed in accordance with section 69 is provided.

59. The direct transfer of liquefied petroleum gas between tank trucks and tank cars on carrier’s right-of-way is prohibited.

60. All loading and unloading tracks shall be grounded and bonded at the loading and unloading site in accordance with the Electric Sparks Prevention Regulations.

61. The loading and unloading of tank cars located on carrier’s tracks are subject to the following conditions:

• (a) except as provided in paragraph (c), tank car discharge connections shall be equipped with excess flow valves;

• (b) lading shall be piped directly to permanent storage tanks of sufficient capacity to receive the entire contents of the tank car; the tanks and all of the facilities associated with them shall be in accordance with all applicable provisions of these Regulations;

• (c) tank cars of the I.C.C. 106A type may be loaded or unloaded on carrier’s track if written permission is obtained from the carrier concerned and equipment is provided for the safe loading or unloading of the unit tanks, but such tanks shall not be stored on carrier’s property except as provided in these Regulations; and

• (d) when the carrier’s track is a team track, it is recommended that, where practicable, the tank car be protected during loading or unloading by a locked derail located at least one car length from the tank car on the connected end or ends of the team track.