California Code, Education Code - EDC § 17021.3

(a) For purposes of this chapter, “modernization” or “renovation” means any modification of an existing structure, the costs of which do not exceed 25 percent of the replacement cost of that structure.

(b) No project shall be approved for the modernization of any school facility unless and until both of the following are demonstrated to the satisfaction of the board:

(c) No project shall be approved for the modernization of any school facility that was constructed less than 30 years prior to the date of the approval of the project applied for under this chapter.

(d) The State Allocation Board may waive the requirement in subdivision (c) if the building has been declared by the Office of the State Architect to be, or is in imminent danger of becoming, a health or safety hazard to the pupils. This determination may only be made in the case of a natural disaster, for example, fire, flood, or earthquakes, or as a result of a determination by a qualified engineer, and agreed to in writing by the Office of the State Architect.