Mich. Comp. Laws § 286.222

Sec. 22. A person that wishes to ship plants or plant products into another state or country may request that the director inspect the plants or plant products for insect pests or diseases or other factors likely to prevent the acceptance of the plants or plant products in that state or country. The request shall include an agreement to pay in full the expenses of the inspection. Upon receipt of a request and agreement under this section, or as soon thereafter as may be conveniently practicable, the director shall comply with the request and, upon the receipt of the expenses of the inspection, shall issue to the applicant a certificate to the facts disclosed.