No state agency, board, or commission may require, prohibit, or regulate the use of an electronic signature in a transaction in which the agency, board, or commission is not a party unless a law other than this title expressly authorizes the requirement, prohibition, or regulation.
Source:
Section 1633.17, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CIV§ionNum=1633.17..