1. (1) During the transition period between the adoption date of this rule and the effective dates listed below, employers may comply with the applicable requirements in the employer chemical hazard communication standards under WAC 296-800-170 and chapter 296-307 WAC, Part Y-1, or the requirements of this section, or both.
2. (2) During the transition period between the adoption date of this rule and the effective dates listed below, chemical manufacturers, importers, and distributors may comply with the applicable requirements of chapter 296-816 WAC, Protecting trade secrets, chapter 296-62 WAC, Part B-1, Trade secrets, chapter 296-839 WAC, Content and distribution of material safety data sheets (MSDSs) and label information, chapter 296-307 WAC, Part Y-2, Material safety data sheets and label preparation, or the requirements of this section, or both.

3. (3) Employers, chemical manufacturers, importers, and distributors evaluating substances must be in compliance with all provisions of this section no later than July 20, 2026.

   1. (a) For substances, all employers must, as necessary, update any alternative workplace labeling used under WAC 296-901-14012, update the hazard communication program required by WAC 296-901-14010, and provide any additional employee training in accordance with WAC 296-901-14016 for newly identified physical hazards, health hazards, or other hazards covered under this section no later than July 20, 2026.
   2. (b) For mixtures, chemical manufacturers, importers, and distributors evaluating mixtures must be in compliance with all modified provisions of this section no later than July 19, 2027. Employers must, as necessary, update any alternative workplace labeling; update their hazard communication program; and provide any additional employee training for newly identified physical hazards, health hazards, or other hazards covered under this section no later than January 19, 2028.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060, and chapter 49.17 RCW. WSR 26-02-011, s 296-901-14020, filed 12/30/25, effective 2/1/26. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060 and 29 C.F.R. 1910 Subpart Z. WSR 13-06-050, § 296-901-14020, filed 3/5/13, effective 4/15/13.]