Michigan Compiled Laws, Chapter 408. Labor § 408.684

(a) The “handbook for public playground safety” published for the U.S. consumer products safety commission, which is incorporated by reference and is based upon recommendations provided to the commission by the COMSIS corporation in March 1990 in “development of human factors criteria for playground equipment safety” by Donna Rattle, Melanie Morrison, and Neil Lerner.

(b) The “standard consumer safety performance specification for playground equipment for public use, ASTM F1487-01”, published by the American society for testing and materials, which is incorporated by reference.