1. UK Statutory Instrument No. 0000: the Environmental Permitting (England and Wales (Amendment) Regulations 2018;DEFRA,2018
2. Council directive 2013/59/EURATOM;European Commission;Off. J. Eur. Union,2013
3. Exemption Guidance Guidance for NORM Industrial Activities on How to Comply with the Radioactive Substances Exemption Regime: the Environmental Permitting Regulations 2011 (Amendment);DEFRA,2013