Rule filed September 24, 2024

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The Department of Labor & Industries (L&I) updated its rulemaking website

Rule filed September 24, 2024

For information on all L&I meetings and public hearings related to rulemaking, please visit our public participation calendar.

Division: Field Services and Public Safety (Plumber Program)

Topic: Adoption (CR-103) – Plumber Certification (SHB 1889 & ESB 5997 Implementation)

Brief Description: The purpose of this rulemaking is to update the plumber trainee requirements under WAC 296-400A-120. The amendments will affect application for a certificate, supervision ratios, and reporting of plumbing hours for plumber trainees. The amendments are needed for uniformity with the requirements in Substitute House Bill 1889 (SHB 1889), Chapter 50, Laws of 2024; and Engrossed Senate Bill 5997 (ESB 5997), Chapter 97, Laws of 2024.

Adopted amendments to WAC 296-400A-120, What do I need to know about plumber trainee certificates?:

  • Permits plumber trainee applicants the option of providing an ITIN in lieu of a SSN when applying for a plumber trainee certificate for uniformity with SHB 1889.
  • Updates language for uniformity with ESB 5997. This includes:
    • Amending the expiration date for the required supervision ratios for plumber trainees to certified plumbers from December 31, 2025, to December 31, 2028; and
    • Removing the requirements that failure of a trainee to report plumbing hours worked for each employer is a violation of chapter 18.106 RCW, subject to an infraction under RCW 18.106.320, and must result in nonrenewal of a plumbing trainee certificate.
  • Includes amendments to existing language for clarity.

Effective date: September 24, 2024

Additional information about this rulemaking:
CR-103 Adoption
Adoption Language


Washington State Department of Labor & Industries · 7273 Linderson Way SW · Tumwater WA 98501