Gov. Code, § 11506

(a) Within 15 days after service of the accusation or District Statement of Reduction in Force the respondent may file with the agency a notice of defense, or, as applicable, notice of participation, in which the respondent may:

(1) Request a hearing.

(2) Object to the accusation or District Statement of Reduction in Force upon the ground that it does not state acts or omissions upon which the agency may proceed.

(3) Object to the form of the accusation or District Statement of Reduction in Force on the ground that it is so indefinite or uncertain that the respondent cannot identify the transaction or prepare a defense.

(4) Admit the accusation or District Statement of Reduction in Force in whole or in part.

(5) Present new matter by way of defense.

(6) Object to the accusation or District Statement of Reduction in Force upon the ground that, under the circumstances, compliance with the requirements of a regulation would result in a material violation of another regulation enacted by another department affecting substantive rights.

(b) Within the time specified the respondent may file one or more notices of defense, or, as applicable, notices of participation, upon any or all of these grounds but all of these notices shall be filed within that period unless the agency in its discretion authorizes the filing of a later notice.

(c) The respondent shall be entitled to a hearing on the merits if the respondent files a notice of defense or notice of participation, and the notice shall be deemed a specific denial of all parts of the accusation or District Statement of Reduction in Force not expressly admitted. Failure to file a notice of defense or notice of participation shall constitute a waiver of respondent’s right to a hearing, but the agency in its discretion may nevertheless grant a hearing. Unless objection is taken as provided in paragraph (3) of subdivision (a), all objections to the form of the accusation or District Statement of Reduction in Force shall be deemed waived.

(d) The notice of defense or notice of participation shall be in writing signed by or on behalf of the respondent and shall state the respondent’s mailing address. It need not be verified or follow any particular form.

(e) As used in this section, “file,” “files,” “filed,” or “filing” means “delivered or mailed” to the agency as provided in Section 11505.