Cal. Code Regs. tit. 11 § 3
The proposed defendant shall be allowed 15 days after service, within which to appear and show cause in accordance with the provisions of Section 2(c), if the notice be served within the county in which the proceeding is to be brought, and 20 days if served elsewhere. A shorter time may and will be prescribed by the Attorney General in special cases or upon a showing of good cause therefor. An extension of the period for appearance herein limited may be granted by stipulation between the relator and the proposed defendant if filed with the Attorney General, and may be granted by the Attorney General upon a showing of good cause therefor. Any statement of facts filed by the proposed defendant shall be verified in like manner as the proposed complaint.
Cal. Code Regs. Tit. 11, § 3