reg 3 Publication of the linked services list
(1) The Authority must maintain a published list of the most representative services linked to a payment account and subject to a fee (“the linked services list”). (2) The linked services list must— (a) feature at least 10 and no more than 20 of the most representative services linked to a payment account offered by at least one payment service provider and subject to a fee; and (b) contain terms and definitions for each of the services featured; ... (c) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .