portability;
(d) obligation to provide subscribers listed in
public directories with information;
(e) transfer of usage rights at the initiative of
the rights-holder, and conditions applicable
to the transfer;
(f) charges for usage rights; and
(g) obligations under relevant international
agreements relating to number usage.
(4) Specific conditions relating to the use and
effective management of radio-frequency spectrum
that may be attached to information and commu
nications licences where justified and with due
respect for the principle of proportionality, include
(a) designation of the service or type of network
or technology for which spectrum usage
rights have been granted, including,
where applicable, exclusive use of a
frequency for the transmission of content or
specific audiovisual services;
(b) effective and efficient use of frequencies,
including, where appropriate, requirements
in regard to coverage;
(c) technical and operational conditions neces
sary to avoid harmful interference and limit
exposure of the public to electromagnetic
fields, where those conditions differ from
those laid down in this Act;
(d) transfer of radio-frequency spectrum usage
rights at the initiative of the rightsholder, and conditions applicable to the
transfer;
(e) fees for the use of spectrum;
(f) commitments made during the competitive
or comparative selection process by the
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