In relation to workers on United Kingdom ships, and other ships while in United Kingdom waters, these Regulations implement Directive 2013/35/EU of 26th June 2013 on the minimum health and safety requirements regarding the exposure of workers to risks arising from physical agents (electromagnetic fields) (20th individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC ) and repealing Directive 2004/40/EC . This Directive has been implemented in respect of other workers by the Control of Electromagnetic Fields at Work Regulations 2016 .