The FCA 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 (imposition of requirements), 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 FCA is satisfied that the conditions set out in regulation 6(4) to (9) (conditions for authorisation) and, if applicable, the requirement in regulation 22(1) (capital requirements) to maintain own funds, are being or are likely to be met.