(1) If the Locomotive is Remanufactured or Repowered to a Cleaner Locomotive prior to January 1, 2030, the Original Engine Build Date will be based on the first year the Locomotive Engine was Remanufactured or Repowered to a Cleaner Locomotive.

(2) A Locomotive may continue to Operate in California beyond the age specified in subsection (a) if at least one of the following applies:

(1) By December 1, 2027, CARB staff shall publish an assessment of the progress made in ZE Locomotive and ZE Rail Equipment technologies for use with Freight Line Haul, Switch, Industrial, and Passenger Locomotives, as well as the status of safety and infrastructure improvements that may be needed to support ZE Locomotives, and make the assessment available for public review at least 30 calendar days prior to presenting the report to the Board. If staff finds that the compliance deadlines under this Locomotive Regulation need to be adjusted forward or backward in time, the report will include recommendations to initiate staff's development of potential formal regulatory amendments.

(1) By December 1, 2032, CARB staff shall publish an assessment of the progress, since the 2027 assessment, made in ZE Locomotive and ZE Rail Equipment technologies for use with Freight Line Haul Locomotives, as well as the status of safety and infrastructure improvements that may be needed to support ZE Locomotives, and make the assessment available for public review at least 30 calendar days prior to presenting the report to the Board. If staff finds that the compliance deadlines under this Locomotive Regulation need to be adjusted forward or backward in time, the report will include recommendations to initiate staff's development of potential formal regulatory amendments.