(1)In this Part “digital additional service” means any service which—
(a)is provided by any person with a view to its being broadcast in digital form by means of a radio multiplex service, whether by him or by some other person, but
(b)is not a digital sound programme service, a simulcast radio service, an ancillary service or a technical service.
(2)In this Part “ancillary service” means any service which is provided by the holder of a digital sound programme licence or by an independent national broadcaster and consists in the provision of any service (other than advertising) which—
(a)is ancillary to programmes included in a digital sound programme service or simulcast radio service provided by him and is directly related to their contents, or
(b)relates to the promotion or listing of such programmes.
(3)In this Part “technical service” means a service which—
(a)is provided for technical purposes connected with the encryption or decryption of one or more digital sound programme services or digital additional services, and
(b)is of a description specified in an order made by the Secretary of State.
(4)An order under subsection (3) shall be subject to annulment in pursuance of a resolution of either House of Parliament.