Mich. Comp. Laws § 4.1109

Sec. 109. An employee of the bureau shall not urge or oppose legislation, but upon request shall aid and assist the members of the legislature by advising as to bills and resolutions and by furnishing to them the fullest information upon all matters within the scope of the bureau relating to their public duties. However, the director may recommend legislation to the legislative council or the law revision commission. An employee of the bureau shall not reveal to any person outside the bureau the contents or nature of any matter not yet published without the consent of the person bringing the matter before the bureau. A substitute recommended by a committee, an amendment recommended by a committee, or a conference report shall be considered published when received by the clerk of the house of representatives or secretary of the senate or both, as is appropriate. The clerk of the house of representatives or the secretary of the senate, as is appropriate, shall notify the bureau upon receipt of a substitute, an amendment recommended by a committee, or a conference committee report.