The hearing shall be commenced not later than 10 days after the day on which such petition was filed. Upon application of the petitioner the enforcement agency may, however, postpone the date of the hearing for a reasonable time beyond the 10-day period, if in its judgment the petitioner has submitted a good and sufficient reason for the postponement.
Source:
Section 18870.16, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=18870.16..