The split roll initiative likely exempts many parking lots from reassessment at least until June 2025 since they can count as “small business” (fewer than 50 employees) (https://oag.ca.gov/system/files/initiatives/pdfs/19-0008%20%...)
I think that's a protection against the business owning a Trust that owns the land. It's to force the business to own the land directly.
(That’s the SBA cutoff for “small business” in property renting; NAIC business codes 5311x0.)
https://www.sba.gov/sites/default/files/2019-08/SBA%20Table%...