This is a snapshot of the persistent organic pollutants (POPs) Assimilated Regulation (EU) 2019/1021. This Practice Note includes details on the background of the recast Regulation, purpose, scope, definitions and key requirements, such as control of production, placing on the market and use and exemptions from control measures, stockpiles, waste management, release reduction, minimisation and elimination, as well as monitoring. It also includes details of the Persistent Organic Pollutants (Amendment) (EU Exit) Regulations 2020, SI 2020/1358 which make amendments to ensure the Assimilated POPs Regulation can continue to operate following IP completion day and Brexit.