California Air Resources Board (CARB) regulations


Since 1st January 2023, California has in force the new at-berth reporting requirements about ship emissions. Does this regulation apply to all types of vessels?

Hi @ZhengYiSao,

The Ocean-Going Vessels at Berth Regulations aim to reduce diesel particulate matter (PM) and nitrogen oxides (NOx) from ocean-going vessel’s auxiliary engines at berth in California ports and were introduced in 2007. Amendments to the ‘at berth’ regulations in 2020 expanded the scope of application to more ship types and terminals, which came into effect on 1 January 2023.

Depending on the ship type, the emission reduction and reporting requirements at California marine terminals may have a different starting date of compliance. The following table summarizes the compliance starting dates and ship types.


All terminal operators who receive ocean-going vessels at California berths are subject to regulatory requirements.

California Ports:

  • Ports of Los Angeles (POLA)
  • Long Beach (POLB)
  • Oakland
  • San Francisco
  • San Diego
  • Hueneme

Beginning on January 1, 2023, and thereafter, all vessel operators must report to California Air Resources Board (CARB) electronically within 30 calendar days of each vessel’s departure the following visit information:

  • Fleet name
  • Vessel name
  • Vessel IMO number
  • Vessel type
  • IMO NOx tier
  • Vessel operator contact information, including name, address, email address, and telephone number
  • Port, terminal, and berth visited
  • Vessel arrival time and vessel departure time
  • Vessel shift to another berth where applicable
  • Type of CARB Approved Emission Control Strategy (CAECS) used, where applicable
  • Date and time when vessel declared as “Ready to Work”
  • Date and time when a CAECS begins reducing emissions and date and time when a CAECS stops reducing emissions, where applicable
  • Type of fuel used in auxiliary engine(s) and auxiliary boiler(s)
  • Sulfur content of fuel used in auxiliary engine(s) and auxiliary boiler(s), where applicable
  • Amount of fuel used in auxiliary engine(s) and boiler(s), during vessel visit, where applicable;
  • Date and time pilot on-board in preparation for departure
  • Information specified in the approved compliance strategy’s Executive Order compliance instructions
  • Information if a vessel uses an exception, including the type of exception, a detailed description, including dates and times, and any relevant correspondence (e.g. emails) documenting the visit exception;
  • Report if a request for the use of the remediation fund,
  • Report if a vessel operator or terminal operator uses a Terminal Incident Events (TIE) or Vessel Incident Events (VIE) for the visit including the contact information of the responsible official who authorized the use of the TIE or VIE; and
  • Report if a CARB approved innovative concept is used to reduce emissions for the visit in compliance with this Control Measure, as required in the innovative concept’s Executive Order

The at Berth Reporting Templates are available on the Califorina Air Resources Board website: