7 Del. Admin. Code § 1140-13.0
For all California-certified vehicles registered in Delaware, each manufacturer shall undertake an action equivalent to that which is required by any order or enforcement action taken by CARB, or any voluntary or influenced emission related recall initiated by any manufacturer pursuant to Title 13, CCR, Sections 1962.7, 2101, 2109 through 2120, 2122 through 2133, 2135 through 2149, 2167, and 2168 unless within 30 days of CARB approval of said recall, the manufacturer demonstrates to the Agency that such recall is not applicable to vehicles registered in Delaware. Each manufacturer must send to owners of Delaware registered California-certified vehicles the same notice that is used for California owners required by Title 13, CCR, Sections 2118 or 2127, except that it should contain a telephone number appropriate for Delaware.
7 Del. Admin. Code § 1140-13.0