• “relevant authority” means—

  1. a

     in so far as these Regulations apply in relation to, or in relation to any activity carried out on, any nuclear premises, the Office for Nuclear Regulation;

  2. b

     otherwise, the Executive.

• “nuclear premises” means premises which are or are on—

  1. a

     a GB nuclear site (within the meaning given in section 68 of the Energy Act 2013);

  2. b

     an authorised defence site (within the meaning given in regulation 2(1) of the Health and Safety (Enforcing Authority) Regulations 1998);

  3. c

     a new nuclear build site (within the meaning given in regulation 2A of those Regulations); or

  4. d

     a nuclear warship site (within the meaning given in regulation 2B of those Regulations).