18 [360] (4) The competent authority shall consider any representations made by the operator of essential services in accordance with paragraph (3) and shall, within 20 working days of the earlier of— (a) the receipt of the representations, or (b) the expiration of the period referred to in that paragraph, decide whether to make the addition. (5) Where the competent authority decides to make the addition, it shall notify the operator of essential services concerned in writing accordingly. (6) Where an addition referred to in paragraph (1) is made, the competent authority making the addition shall promptly amend the Operators Register maintained by it under Regulation 16 accordingly and where the addition is made by the competent authority referred to in Regulation 7(2) a copy of the amended Operators Register maintained by that competent authority shall be promptly furnished to the competent authority referred to in Regulation 7(1) who shall amend the Combined Operators Register accordingly. Amendment of designation as operator of essential services by cancellation of category of sector or subsector or essential service in respect of which a person is designated 15. (1) A competent authority shall cancel a category of sector or, where appropriate, subsector or an essential service from the category of sector or subsector or essential service in respect of which a person is designated as an operator of essential services where the competent authority is satisfied that the person no longer complies with Regulation 12 in respect of that category of sector or subsector or the essential service. (2) An operator of essential services who is of the view that it is no longer appropriate for it to be designated as an operator of essential services in respect of a particular category of sector or subsector or essential service may notify the competent authority in writing accordingly setting out the reasons why the operator is of that view and requesting cancellation accordingly. (3) Before a competent authority makes a cancellation, the competent authority may request information from the operator of essential services concerned which that competent authority reasonably requires for the purpose of deciding whether to make the cancellation. (4) Where a competent authority proposes— (a) to make a cancellation, or (b) to refuse a request for cancellation made under paragraph (2), it shall notify the operator of essential services concerned in writing accordingly—