Michigan Compiled Laws, Chapter 722. Children § 722.113b

Sec. 3b. (1) An individual shall not smoke in a child caring institution or child care center or on real property that is under the control of a child caring institution or child care center and upon which the child caring institution or child care center is located, including other related buildings.The operator of a child care center shall conspicuously post on the premises a notice that specifies that smoking on the premises is prohibited.

(2) As used in this section and section 3c,  1 “smoke” or “smoking” means those terms as defined in section 12601 of the public health code, 1978 PA 368, MCL 333.12601.