CA Health & Safety Code Section 121916

(a)

Any person or owner of an attack, guard, or sentry dog that operates or maintains a business to sell, rent, or train an attack, guard, or sentry dog shall obtain a permit from the local public agency or private society or pound contracting with the local public agency for animal care or protection services.

(b)

Each local agency shall adopt and implement a permit program for the administration of subdivision (a) by the local agency or private society or pound contracting with the local public agency for animal care or protection services. A local agency may charge a fee for the issuance or renewal of a permit required under this section. The fee shall not exceed the actual costs for the implementation of the permit program.

(c)

For purposes of this section, “local public agency” means a city, county, or city and county.