For the purpose of this chapter, the general provisions of the Health and Safety Code of the state and the definitions as set forth in Division 13, Parts 2 and 2.1 of the code and Title 25 of the California Administrative Code shall apply to this chapter except that the following special definitions shall apply as set forth hereinafter: Enforcement agency is the city building department, the health department of the county and the Department of Housing and Community Development of the state. (Prior code § 17.49.040)