Sales of any bonds, treasury notes, or obligations purchased and held by the board shall, from time to time, be made in season so that the proceeds may be applied to the purposes for which the money with which the bonds, treasury notes, or obligations were originally purchased was placed in the treasury of the board.
Source:
Section 120473, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=120473..