It seems to be very difficult to find the answer to this exact question in UC and CSU residency documentation. Most of it implies that residency is checked when a new or returning student enrolls for the first time, or wants to reclassify from non-resident to resident, but does not specifically state any procedure relating to resident parents of a dependent student leaving California.
http://www.ucop.edu/general-counsel/_files/ed-affairs/uc-residence-policy.pdf
http://www.calstate.edu/sas/residency/
Note that a student who graduates high school in California after attending at least three years of high school in California may be eligible for resident tuition even if classified as a non-resident (AB540 exemption).
http://admission.universityofcalifornia.edu/paying-for-uc/tuition-and-cost/ab540/index.html
http://www.calstate.edu/sas/residency/exceptions-and-exemptions.shtml