Chapter 173-441 & 173-446 WAC, Cap-and-Invest Program Updates and Linkage

Ecology is considering amendments to Chapter 173-446 WAC and Chapter 173-441 WAC to make improvements to the implementation of the Cap-and-Invest Program, facilitate the linkage of Washington’s carbon market with California-Québec carbon market, as well as make other necessary updates.

We originally announced the Cap-and-Invest Linkage rulemaking in April of 2024 (filed a CR-101). On March 31, 2025, we announced the Cap-and-Invest Program Updates and Linkage Rulemaking (filed a new CR-101) to address a broader set of Cap-and-Invest Program topics.

Rulemaking timeline

Timeline

Announcement phase (CR-101)

Filing date:
March 31, 2025


Announcement documents

Announcement documents (withdrawn)

Rule development phase

April 11, 2024 – Early 2026

Public input & involvement

We plan to hold public meetings to provide information about the rulemaking and seek your input. We'll update this page with meeting specifics.

To get updates about these meetings and this rulemaking, join our mailing list.

Draft rule language 

Below are the most updated drafts of the rule language: 

Public comment period (informal) for electric utility allocation topics
April 1, 2025, noon – Oct. 1, 2025, 11:59 p.m.
Provide informal comments on this topic

Public comment period (informal)

June 3, 2024, 5 p.m. – Sept. 27, 2024, 11:59 p.m.

Review informal comments on this rulemaking. 

Public comment period for electricity topics (informal)
Oct. 30, 2024, midnight – Dec. 20, 2024, 11:59 p.m.

Review comments on electricity topics for the linkage rulemaking.

Ecology's public meetings
Date Documents Location

Electric utility allocation workshop

April 17, 2025
1 p.m. to 3 p.m.

Materials will be posted at noon April 16.

Public workshop registration

Linkage Rulemaking Public Meeting

Wednesday, July 10, 2024
2 p.m. to 4 p.m.

Draft rule language (173-441)

Draft rule language (173-446)

Presentation

Public meeting recording

Linkage Environmental Justice
Listening Session

Monday, July 22, 2024
9 a.m. to 11 a.m.

Draft rule language (173-441)

Draft rule language (173-446)

Presentation

Public meeting recording

Linkage Rulemaking Meeting on Electricity Topics

Tuesday, Nov. 19, 2024
9 a.m. to 11 a.m.

Presentation

Requested feedback for comment

Public meeting recording
Webinar information

Register for each webinar to get your meeting ID and passcode. 

To hear the webinar better or to call in only, use your phone (instead of the computer) to call 253‑215‑8782.

Additional languages

Español (Spanish) 中文 (Chinese) Tiếng Việt (Vietnamese) 한국어 (Korean) Français (French) русский (Russian) український (Ukrainian)

Accessibility

To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, 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.