70 Pa. Code § 33.21 – Duties of owners and operators of automatic temperaturecompensators.

(a) If a meter is equipped with an automatic temperature compensator, it shall be connected, operable and in use at all times. The automatic temperature compensator may not be removed, nor may a compensated meter be replaced on a delivery vehicle with an uncompensated meter without the written approval of the Director of the Bureau.
(b) If a person or business utilizes automatic temperature compensators, then they shall only sell home heating oil by the use of a meter equipped with an automatic temperature compensator, and delivery vehicles operated by that business used to deliver home heating oil to domestic consumers shall be equipped with a meter and an automatic temperature compensator.
(c) Metered delivery tickets shall have clearly printed on them, in identical size and type as that used in the sellers address, the statement ‘‘Volume Delivered Adjusted to 60°F.’’