“Base hospital” means one of a limited number of hospitals which, upon designation by the local EMS agency and upon the completion of a written contractual agreement with the local EMS agency, is responsible for directing the advanced life support system or limited advanced life support system and prehospital care system assigned to it by the local EMS agency.
Source:
Section 1797.58, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=1797.58..