34 Pa. Code § 29.144 – Belts on overhead pulleys.

(a) Belt pole. A belt pole should be used to throw off or put on belts.
(b) Unshipping. In unshipping a belt, it should always be thrown off the driving pulley, not the driven one.
(c) Care. It is advisable to have one experienced man to take care of overhead belts and put them on and take them off pulleys.
(d) Belt perches. Belts should not be allowed to ride on shafting but should be held from the shafting either by loops or belt perch.

This section cited in 34 Pa. Code § 29.141 (relating to purpose).