7Consent on behalf of performers
Where in any proceedings under this Act it is proved—
(a)that the record, cinematograph film or broadcast to which the proceedings relate was made with the consent in writing of a person who, at the time of giving the consent, represented that he was authorised by the performers to give it on their behalf, and
(b)that the person making the record, film or broadcast had no reasonable grounds for believing that the person giving the consent was not so authorised,
the provisions of this Act shall apply as if it had been proved that the performers had themselves consented in writing to the making of the record, film or broadcast.