No additional inspection shall be required under this division on any vehicle which is owned and operated by a public agency and is used for responding to and returning from an emergency, as defined in subdivision (c) of Section 35002, during the duration of the emergency, as determined by the public agency, if an inspection pursuant to Section 1215 of Title 13 of the California Code of Regulations has been completed on the vehicle within the past 24 hours. Any vehicle used in responding to an emergency shall be inspected immediately upon the termination of the emergency.
Source:
Section 34500.2, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=VEH§ionNum=34500.2..