Cal. Educ. Code § 56501.5
(a) Notwithstanding any other provision of law, prior to the opportunity for an impartial due process hearing under this chapter, the local educational agency shall convene a resolution meeting with the parents and the relevant member or members of the individualized education program team who have specific knowledge of the facts identified in the due process hearing request, in accordance with Section 1415(f)(1)(B) of Title 20 of the United States Code and Section 300.510 of Title 34 of the Code of Federal Regulations. The parent and the local educational agency shall determine the relevant members of the individualized education program team to attend the meeting.
(d) The 45-day timeline for the due process hearing cited in paragraph (3) of subdivision (f) of Section 56505 starts the day after one of the following events, provided the local educational agency also affords notice of these events to the agency or contractor providing due process hearings pursuant to Section 56504.5:
(e) Except where the parties have jointly agreed to waive the resolution process or to use mediation, notwithstanding subdivision (c), the failure of the parent filing a due process hearing request to participate in the resolution meeting will delay the timelines for the resolution process and due process hearing until the meeting is held.
(f) In the case that a resolution is reached to resolve the due process hearing issue at a meeting described in subdivision (a), the parties shall execute a legally binding agreement that is both of the following: