The new Utilities Contracts Regulations 2016 and the Concession Contracts Regulations 2016, implementing the EU Directives, apply to procurement exercises starting on or after 18 April 2016, except as set out in the Regulations. The concession contracts rules apply to the public sector and utilities. The utilities rules only apply to contracts let by certain utilities.

The government last year prioritised the Public Contracts Regulations 2015, which took effect from 26 February 2015, because they affected the rules governing the most procurement spend and activity.

See: https://www.gov.uk/government/uploads/system/ uploads/attachment data/file/508998/PPN for  laying of UCR and CCR - final version to  publish.pdf