California Law:

THE PEOPLE OF THE STATE OF CALIFORNIA DO ENACT AS FOLLOWS:

SECTION 1. Section 1793 of the Civil Code is amended to read: 

1793. Except as provided in Sections 1793.01 and 1793.02, nothing in this chapter shall affect the right of the manufacturer, distributor, or retailer to make express warranties with respect to consumer goods. However, a manufacturer, distributor, or retailer, in transacting a sale in which express warranties are given, may not limit, modify, or disclaim the implied warranties guaranteed by this chapter to the sale of consumer goods. 

SEC. 2. Section 1793.01 is added to the Civil Code, to read: 

1793.01. A manufacturer, distributor, or retail seller shall not make an express warranty with respect to a consumer good that commences earlier than the date of delivery of the good. This section does not limit an express warranty made before July 1, 2023. 

This law does affect 
All Dealers in the state of CA and/or any Dealer selling to a CA address 
Upfitters in the state of CA and/or any Upfitter selling to a CA address 
RV Retailers in the state of CA and/or any RV Retailers selling to a CA address 
Retail sales w/home delivery from Dealer/Upfitter/RV Retailers in CA and/or to a CA address 

IMPORTANT: The Warranty Start Date/mileage for vehicles sold by a California retailer or to a California resident must start no earlier than the date of vehicle delivery.  

This law will not affect 
Dealers/Upfitters/RV Retailers not in CA and/or not selling to CA address
Business and Fleet Sales  
Used Vehicles