Chapter: 8100
Section: 8123.2
Agencies/Departments with field operations where normal payment methods, particularly cash purchase funds, are difficult to maintain or impractical to use, may use the bank draft system.
Agencies/Departments may use bank drafts for purchases that have all of the following conditions:
Immediate pay ...
https://www.dgs.ca.gov/Resources/SAM/TOC/8100/8123-2