California Code, Penal Code - PEN § 627.5

Any person who is denied registration or whose registration is revoked may request a hearing before the principal or superintendent on the propriety of the denial or revocation.  The request shall be in writing, shall state why the denial or revocation was improper, shall give the address to which notice of hearing is to be sent, and shall be delivered to either the principal or the superintendent within five days after the denial or revocation.  The principal or superintendent shall promptly mail a written notice of the date, time, and place of the hearing to the person who requested the hearing.  A hearing before the principal shall be held within seven days after the principal receives the request.  A hearing before the superintendent shall be held within seven days after the superintendent receives the request.