CA Fam Code Section 3178

An agreement reached by the parties as a result of mediation shall be limited as follows:

(a)

Where mediation is required to settle a contested issue of custody or visitation, the agreement shall be limited to the resolution of issues relating to parenting plans, custody, visitation, or a combination of these issues.

(b)

Where a stepparent or grandparent seeks visitation rights, the agreement shall be limited to the resolution of issues relating to visitation.