Mich. Comp. Laws § 18.1277

Sec. 277. A state board or commission shall not make an expenditure for mailing a letter, newsletter, report, or other publication unless 1 or more of the following is applicable: (a) The mailing is required by law. (b) The mailing is paid for by the person to whom the mailing is addressed. (c) The mailing is a direct response to a specific question of the person to whom the mailing is addressed. (d) The mailing is specifically authorized by a majority vote of a state board or commission. (e) The mailing is sent to an individual or entity and seeks information necessary for a state board or commission to render a decision. This subdivision does not include a questionnaire or general letter which attempts to assist in the taking of a survey.