DRIVING IN CALIFORNIA
Nonresident persons do not need to get a California driver license. The state
recognizes out of state and foreign driver licenses for nonresident individuals.
Section 12502 and 12505 (reported below) of the vehicle code defines
nonresident based on the individual's state of domicile which is defined as: "the
state where a person has his or her true, fixed, and permanent home and
principal residence and to which he or she has manifested the intention of
returning whenever he or she is absent."
Vehicle Code
Section 12502
(a) The following persons may operate a motor vehicle in this state without
obtaining a driver license under this code:
(1) A nonresident over the age of 18 years having in his or her immediate
possession a valid driver license issued by a foreign jurisdiction of which
he or she is a resident, except as provided in Section 12505.
Section 12505
(a) (1) For purposes of this division only and notwithstanding Section 516,
residency shall be determined as a person’s state of domicile. "State of domicile"
means the state where a person has his or her true, fixed, and permanent home
and principal residence and to which he or she has manifested the intention of
returning whenever he or she is absent.
Prima facie evidence of residency for driver licensing purposes includes,
but is not limited to, the following:
(A) Address where registered to vote.
(B) Payment of resident tuition at a public institution of higher education.
(C) Filing a homeowner’s property tax exemption.
(D) Other acts, occurrences, or events that indicate presence in the state
is more than temporary or transient.
(b) The presumption of residency in this state may be rebutted by satisfactory
evidence that the licensee’s primary residence is in another state.
http://www.dmv.ca.gov/pubs/vctop/d06/vc12505.htm