Cal. Bus. & Prof. Code § 11018.3

Any subdivider objecting to the denial of a public report may, within 30 days after receipt of the order of denial, file a written request for a hearing. The commissioner shall hold the hearing within 20 days thereafter unless the party requesting the hearing requests a postponement. If the hearing is not held within 20 days after request for a hearing is received plus the period of the postponement or if a proposed decision is not rendered within 45 days after submission and an order adopting or rejecting the proposed decision is not issued within 15 days thereafter, the order of denial shall be rescinded and a public report issued.