ACCT^® Equipment Standards
Chapter 1 - Section F6 & Section F9
"Pulleys and trolleys used to support individual participants shall be used as intended by the manufacturer and meet the strength requirements for personal protection anchors (C3.1) when used as part of the belay system. Pulley sheaves shall be compatible with the other items with which they are used."

"A shear reduction device should be used for dynamically belayed diving/leaping elements (or other activities with similar dynamic features) and meet the strength requirements for personal protection anchors (C3.1).