Operational Circulars 500-599
- OC 520/22 - The hygienic design of food machinery: Supply of Machinery (Safety) Regulations 2008 & Machinery Directive (2006/42/EC)
- OC 559/8 - Guidelines for magnetic resonance diagnostic equipment
- OC 560/26 - Fitness for work with ionising radiations
- OC 560/50 - Occupational exposure to radon in workplace buildings
- OC 560/54 - The ionising radiations regulations 1999, Outside workers (including applications for exemption from issue and use of radiation passbooks)