2023 Washington Code 19.28.161 – Certification — Apprentices and trainees — Supervision — Ratio of noncertified and certified workers — Trainee hours verification

2022 Washington Code 19.28.161 – Certification–Apprentices and trainees–Supervision–Ratio of noncertified and certified workers–Trainee hours verification

2020 Washington Code 19.28.161 – Certification — Apprentices and trainees — Supervision — Ratio of noncertified and certified workers — Trainee hours verification

2019 Washington Code 19.28.161 – Certification — Apprentices and trainees — Supervision — Ratio of noncertified and certified workers — Trainee hours verification

2018 Washington Code 19.28.161 – Certification — Apprentices and trainees — Supervision — Ratio of noncertified and certified workers — Trainee hours verification

2016 Washington Code 19.28.161 – Certification–Apprentices and trainees–Supervision–Ratio of noncertified and certified workers–Trainee hours verification

2015 Washington Code 19.28.161 – Certification–Apprentices and trainees–Supervision–Ratio of noncertified and certified workers–Trainee hours verification

2014 Washington Code 19.28.161 – Certification — Apprentices and trainees — Supervision — Ratio of noncertified and certified workers — Trainee hours verification

2013 Washington Code 19.28.161 – Certification — Apprentices and trainees — Supervision — Ratio of noncertified and certified workers — Trainee hours verification

2009 Washington Code 19.28.161 – Certificate of competency required — Written warning, penalty — Electrical training certificate — Fee — Verification and attestation of training hours