WA SB5415

Prohibits the Director of the Office of Financial Management from certifying collective bargaining agreements as financially feasible if the governor's budget proposes to fund them through tax increases or withdrawals from the budget stabilization account requiring a three-fifths legislative vote

Applies this financial feasibility restriction to collective bargaining agreements covering multiple categories of public employees including family child care providers, adult family home providers, Washington State Patrol officers, school district employees, language access providers, fish and wildlife officers, state employees, ferry workers, and individual home care providers

Defines "raising taxes" broadly as any legislative action that increases state tax revenue deposited in any fund, budget, or account, regardless of whether revenues go to the general fund

Requires the legislature to approve or reject funding requests for collective bargaining agreements as a whole, with agreements reopened for renegotiation if the legislature rejects or fails to act on the submission

Amends eleven sections of existing law across multiple RCW chapters (41.56, 41.59, 41.80, 47.64, and 74.39A) governing collective bargaining for various categories of state and quasi-state employees