All CalFresh households shall be assigned certification periods that are the maximum number of months allowable under federal law for the household type unless a county is complying with subdivision (b) of Section 18910 or, on a case-by-case basis only, the household’s individual circumstances require a shorter certification period.
Source:
Section 18910.1, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=WIC§ionNum=18910.1..