Amending the climate commitment act by adjusting auction price containment mechanisms and ceiling prices, addressing the department of ecology's authority to amend rules to facilitate linkage with other jurisdictions, and providing for market dynamic analysis.

Extended the price ceiling protection period to cover both calendar years 2026 and 2027, increasing from just 2026.

Added a requirement for the department to adjust allowance price containment reserve tier 1 and 2 prices to reflect the new 2026 and 2027 price ceilings.

Updated bill metadata to change the bill type from 'House Bill' to 'Substitute House Bill' and updated the reading date from February 14 to February 21, 2025.

Clarified that purchases of price ceiling units are limited to entities lacking sufficient eligible compliance instruments for the current compliance period.

The bill was reclassified from 'Substitute House Bill' to 'Second Substitute House Bill' and transferred from the Environment & Energy committee to the Appropriations committee.

A new section requires the Department of Ecology to conduct economic modeling scenarios, including linkage with other jurisdictions, and publish these results by December 31, 2026, and every two years thereafter.

A new contingency clause states that if specific funding for the act is not provided in the omnibus appropriations act by June 30, 2025, the entire act becomes null and void.

The bill's effective timeline is now explicitly tied to the June 30, 2025 funding deadline, which was not present in the previous version.

Minor technical adjustments were made to the text of RCW 70A.65.160 regarding price ceiling adjustments, though the core $80 price ceiling for 2026-2027 remains unchanged.