Versions of Washington Code 69.50.378 - Cannabis retailer holding medical cannabis endorsement -- THC concentration in products on LawServer 2023 Washington Code 69.50.378 – Cannabis retailer holding medical cannabis endorsement — THC concentration in products 2022 Washington Code 69.50.378 – Cannabis retailer holding medical cannabis endorsement–THC concentration in products 2020 Washington Code 69.50.378 – Marijuana retailer holding medical marijuana endorsement — THC concentration in products 2019 Washington Code 69.50.378 2018 Washington Code 69.50.378 – Marijuana retailer holding medical marijuana endorsement — THC concentration in products