California

To get a learners license you must:
Have a minimum age of 15, 6 months1
Before getting a license or restricted license you must:
Have a mandatory holding period of 6 months
Have a minimum supervised driving time of 50 hours, 10 of which must be at night
Have a minimum age of 161
Restrictions during intermediate or restricted license stage:
Nighttime restrictions 11 p.m.-5 a.m.; duration: 12 months secondary enforcement
Passenger restrictions (family members excepted unless otherwise noted) no passengers younger than 20 (limited exception for immediate family) duration: 12 months secondary enforcement
Minimum age at which restrictions may be lifted:
Nighttime restrictions 17
Passenger restrictions 17

1In California, students enrolled in driver education may drive while supervised by an instructor. License applicants who do not take driver education must wait until age 18 for a license. They are not required to go through an intermediate license stage.