(1) This regulation applies to any OES [An OES is an operator of an essential service as defined in regulation 1(2) of the 2018 Regulations.] who has their head office outside the United Kingdom and -

(a) provides an essential service of a kind referred to in one or more of paragraphs 1, 2, 3 and 10 of Schedule 2 (energy or digital infrastructure sector) within the United Kingdom; or

(b) provides an essential service of a kind referred to in one or more of paragraphs 4 to 9 of Schedule 2 (transport, health or drinking water supply and distribution sector) within the United Kingdom and falls within paragraph (2).

(2) An OES falls within this paragraph if they have received a notice in writing from a designated competent authority for the OES requiring them to comply with this regulation.

(3) An OES to whom this regulation applies must -

(a) nominate in writing a person in the United Kingdom with the authority to act on their behalf under these Regulations, including for the service of documents for the purposes of regulation 24 (a "nominated person");