(2) The regulations may make provision for or with respect to
the fees and other remuneration referred to in this section and, in
particular--
(a) may prescribe different percentages of fees or other
remuneration in respect of different kinds of performances or services
provided by performer representatives, or other matters, and
(b) may
prescribe the amounts (being amounts payable to performers) that are to be
excluded when calculating such fees or other remuneration, and