The State Director of Public Works, upon recommendation of the Division of Architecture, may delegate to any county or city all or part of the powers and duties of the Division of Architecture relating to the inspection of construction of school buildings of school districts within the county or city if, as determined by the Division of Architecture, the county or city has an adequate building inspection program. No delegation under this section shall become effective without the consent of the legislative body of the county or city to which the delegation is made.