The Authority may, on the application of an authorised payment institution, vary that person's authorisation by -
(a) adding a payment service to those for which it has granted authorisation;
(b) removing a payment service from those for which it has granted authorisation;
(c) imposing a requirement such as may, under regulation 7, be included in an authorisation;
(d) cancelling a requirement included in the authorisation or previously imposed under paragraph (c); or
(e) varying such a requirement,
provided that the conditions set out in regulation 6(4) to (8) and, if applicable, the requirement in regulation 18(1) to maintain own funds, will continue to be met.