5.—(1) The description of the charges which are prohibited under regulation 4(1)(b) are charges under a charge structure other than—
(a)a single charge structure; or
(b)a combination charge structure.
(2) In these Regulations, a single charge structure is one under which the charges imposed on the member are calculated solely by reference to the value of the member's rights under the scheme.
(3) In these Regulations, a combination charge structure is one under which charges are calculated by reference to the value of the member's rights under the scheme (‘an existing rights charge’) and either—
(a)calculated as a percentage of the value of contributions (‘a contribution percentage charge’); or
(b)calculated by reference to a period of time and not by reference to contributions or to the value of a member's rights under the scheme (‘a flat fee charge’).
(4) For the purposes of regulation 4(1)(b), neither the charge structure, nor the type of combination charge structure, that applies to a member may be changed during a charges year.