Cal. Educ. Code § 92483

All costs and expenses incident to the issuance and sale of bonds may be paid out of the proceeds of the sale of the bonds. Interest on bonds may be paid out of the proceeds of the sale of the bonds during the actual construction of any project for the acquisition, construction, or completion of which the bonds have been issued, and for a period of not to exceed two years after the completion of the actual construction of the project as provided for in the indenture.