Chapter 173-446 WAC

Ecology is proposing a new rule, Chapter 173-446 WAC, Climate Commitment Act Program The purpose of this rulemaking is to implement parts of the Climate Commitment Act.  In May 2021, the governor signed the Climate Commitment Act which established a cap-and-invest program to help achieve Washington's greenhouse gas limits by 2050.

This rulemaking will establish a structure for the cap-and-invest program that may include, but are not limited to:

  • Program registration requirements
  • Methods and procedures for allocating allowances
  • Allowance budgets for the first compliance period (2023-2026)
  • Auction registration requirements
  • Auction floor price
  • Emissions containment reserve
  • Procedures and protocols for establishing offset projects
  • Enforcement provisions
  • Transfer and sale of allowances and recognition of compliance instruments
  • Other elements to support the operation and function of the cap-and-invest program

Rulemaking timeline


Announcement phase (CR-101)

Filing date:
Aug. 4, 2021

Announcement documents

Rule development phase

August 4, 2021 – Spring 2022

Public input & involvement

Ecology plans to hold stakeholder meetings this fall. We will update this page with meeting specifics. To get updates about these meetings and this rulemaking, join our email list.

Additional languages

Español (Spanish) 中文 (Chinese) Tiếng Việt (Vietnamese) 한국어 (Korean)


To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, contact Ecology's ADA Coordinator by email at, or call 360-407-6831. People with impaired hearing may call Washington Relay Service at 711. People with speech disability may call TTY at 877-833-6341.