This page last reviewed December 21, 2015

Offset Project Operators


Offset Project Operators (OPOs) may develop offset projects to achieve GHG reductions and removal enhancements in uncapped sources.  Offset Project Operators may also designate an Authorized Project Designee (APD) to develop the project and interact with ARB and Offset Project Registries.  Offset Project Operators and Authorized Project Designees must use ARB Compliance Offset Protocols to quantify GHG reductions and removal enhancements, monitor, report, and verify their offset projects.

Registration Requirements

Offset Project Operators and Authorized Project Designees are required to register in the Compliance Instrument Tracking System Service (CITSS) before listing offset projects.  Information on how to register can be found on the CITSS web page: /cc/capandtrade/markettrackingsystem/markettrackingsystem.htm

Approved ARB Compliance Offset Protocols

OPOs and APDs must develop offset projects using an ARB-approved Compliance Offset Protocol.  ARB has approved five Compliance Offset Protocols for use in generating ARB offset credits.

Offset Program Guidance and Frequently Asked Questions (FAQs)

ARB has developed general guidance on the compliance offset program which includes a description of the requirements that OPOs and APDs must meet under the Regulation.  

Relevant Forms for OPOs and APDs

To be issued ARB offset credits, OPOs and APDs will need to submit information for listing, reporting, and issuance of offset credits.  ARB will make forms available on the Compliance Offset Program Forms web page for ease of submitting these types of information.  They can be also accessed on the web page of each Offset Project Registry.

For questions or comments, please contact Stephen Shelby at (916) 327-8228 or via email at