16.—(1) This regulation applies where a person who is a promoter in relation to notifiable contribution arrangements is providing (or has provided) services to any person (“the client”) in connection with the notifiable contribution arrangements and either—
(a)the promoter is subject to the reference number information requirement; or
(b)the promoter has failed to comply with regulation 8(1) or (3) in relation to the notifiable contributions arrangements (or the notifiable contribution proposal for them) but would be subject to the reference number information requirement if a reference number had been allocated to the notifiable contribution arrangements.
(2) For the purposes of this regulation “the reference number information requirement” is the requirement under regulation 13(2) to provide to the client prescribed information relating to the reference number allocated to the notifiable contribution arrangements.
(3) The promoter must, within the prescribed period after the end of the relevant period, provide HMRC with the prescribed information in relation to the client.
(4) In paragraph (3) “the relevant period” means the prescribed period during which the promoter is or would be subject to the reference number information requirement.
(5) The promoter need not comply with paragraph (3) in relation to any notifiable contribution arrangements at any time after HMRC have given notice under regulation 13(6) in relation to the arrangements.