I think these are the relevant sections of the code; see section 4604(d)3, and 5004. I think your paint job alone makes it of historic interest in my book.
https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=VEH§ionNum=4604
http://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?sectionNum=5004&lawCode=VEH