Chapter: 8400
Section: 8422.115
When determining the mode of transportation, travelers shall use the most economical means of transportation (e.g., taxi, transportation network company (rideshare), rail, bus, air, state vehicle, commercial or privately-owned vehicle). If transportation rental is selected, the customer's copy ...
https://www.dgs.ca.gov/Resources/SAM/TOC/8400/8422-115