In determining the amount of bonds to be issued, the local agency may include all costs of the issuance of such revenue bonds, bond reserve funds, and bond interest estimated to accrue for a period not exceeding 12 months from the date of the bonds.
Source:
Section 37930.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=37930.5..