Oklahoma medical marijuana regulators are administering laboratory testing after a three-month grace period to ensure enough licensed labs are in place amid the coronavirus pandemic.
The mandatory testing requirements apply to all marijuana products sold by a grower or processor.
Sales in 2019 were estimated at $345 million.
A processor or grower is required to retain test results and related records for at least two years.
A medical marijuana dispensary customer may request to see the test records, or what is called a certificate of analysis, to ensure the quality and potency of the product being purchased matches the label.