Mich. Comp. Laws § 691.1334

Sec. 4. (1) A collaborative law participation agreement must satisfy all of the following requirements: (a) Be in a record. (b) Be signed by the parties. (c) State the parties' intention to resolve a collaborative matter through a collaborative law process under this act. (d) Describe the nature and scope of the matter. (e) Identify the collaborative lawyer who represents each party in the process. (f) Contain a statement by each collaborative lawyer confirming the lawyer's representation of a party in the collaborative law process. (2) Parties may agree to include in a collaborative law participation agreement additional provisions not inconsistent with this act.