Section 38085 Of Article 3. Evidences Of Identification From California Vehicle Code >> Division 16.5. >> Chapter 2. >> Article 3.

. (a) Every owner upon receipt of an identification certificate shall maintain the same or a facsimile copy thereof with the vehicle for which it is issued at all times when the vehicle is operated or transported.
  (b) The provisions of this section do not apply when an identification certificate is removed from the vehicle for the purpose of application for renewal or transfer of identification.