2016-8-4 · of wheel chocks. B. Scope. This instruction applies OSHA-wide. C. Reference. OSHA Instruction STD 1-11.5, January 31, 1978, Powered Industrial Trucks, Chocks, and Blocks. D. Action. OSHA Regional Administrators/Area Directors shall take action to ensure that 29 CFR 1910.178(k)(1) and (m)(7) are enforced in accordance with the guidelines in F.