Quick-Couplers

MIOSHA Fact Sheet: 

Quick-Couplers On Construction Equipment (doc / pdf)

Rules & Regulations 

Part 1 - General Rules, Rule 114 
Part 10 - Lifting and Digging Equipment 

Other Publications/Information 

OSHA, Hazards of Inadequately Securing Hydraulic Excavator Buckets When Using Quick Coupling Devices