California Code, Welfare and Institutions Code - WIC § 14043.25

(a) The application form for enrollment, the provider agreement, and all attachments or changes to either, shall be signed under penalty of perjury.

(b) The department may require that the application form for enrollment, the provider agreement, and all attachments or changes to either, submitted by an applicant or provider licensed pursuant to Division 2 (commencing with Section 500) of the Business and Professions Code, the Osteopathic Initiative Act,  1 or the Chiropractic Initiative Act,  2 be notarized.

(c) Application forms for enrollment, provider agreements, and all attachments or changes to either, submitted by an applicant or provider not subject to subdivision (b) shall be notarized.  This subdivision shall not apply with respect to providers under the In-Home Supportive Services program or any providers that choose to enroll electronically.

(d) The department shall collect an application fee for enrollment, including continued enrollment or enrollment at a new location or a change in location.  The application fee shall not be collected from individual physicians or nonphysician practitioners, from providers that are enrolled in Medicare or another state's Medicaid program or Children's Health Insurance Program, from providers that submit proof that they have paid the applicable fee to a Medicare contractor or to another state's Medicaid program, or pursuant to an exemption or waiver pursuant to federal law.  The application fee collected shall be in the amount calculated by the federal Centers for Medicare and Medicaid Services in effect for the calendar year during which the application for enrollment is received by the department.