Mich. Comp. Laws § 290.537

Sec. 7. The director of agriculture by any duly authorized agent is hereby authorized to select from any package of liming material exposed for sale in this state a quantity not exceeding 2 pounds, for a sample, such sample to be used for the purpose of an official analysis and for comparison with the certificate filed with the director of agriculture and with the certificate affixed to the package on sale. The director of agriculture, his deputy or any authorized agent of the director, shall have free access during reasonable business hours to all premises where liming materials are manufactured, sold or stored, and is authorized at all times to seize or stop-sale any and all liming materials, that are unlicensed, misbranded, fail to meet guarantee or otherwise fail to comply with the provisions of this act.