(1) The Authority may vary a person's authorisation in any of the ways mentioned in regulation 8 if it appears to the Authority that -
(a) the person no longer meets, or is unlikely to continue to meet, any of the conditions set out in regulation 6(4) to (8) or, if applicable, the requirement in regulation 18(1) to maintain own funds;
(b) the person has provided a particular payment service or payment services other than in accordance with the authorisation granted to it;
(c) the person would constitute a threat to the stability of a payment system by continuing to provide a particular payment service or payment services;
(d) the variation is desirable in order to protect the interests of consumers; or
(e) the person's provision of a particular payment service or payment services is otherwise unlawful.
(2) A variation under this regulation takes effect -
(a) immediately, if the notice given under paragraph (6) states that that is the case;
(b) on such date as may be specified in t