November 1941, but does not state what these sole professional
services are to be. The incorporated document is also silent on this
point. It is in an omnibus form which must be adapted to meet the
circumstances of each particular case. It relates mainly to perform-
ances at rehearsals and on the stage. But the negative covenant
contained in clause 8 includes an agreement not to manage or appear
or take part in any theatrical or musical performances. By clause 1
the respondent employs the artist and the artist agrees to act,
perform, sing, dance, or otherwise exercise his talents at such
theatres, opera houses, halls, cabarets, places of public entertain-
ment, and for films, radio, television and recordings, as required
and directed by the company in Australia or New Zealand. By
clause'$ (b) the artist agrees to perform and render for the company
or any other company, firm, person or persons nominated by the
company all such characters, parts, specialties, turns and recordings
as may be assigned to him or her. But these options could only be
exercised so that the artist should be given a suitable part for his or
her talents; and particular characters or parts would have to be
assigned to an artist in each production, as it could not be expected
that an artist who could only act should be asked to sing or dance,
or that any artist should have to fulfil more than a reasonable number
of different characters or parts in any particular production. The
agreement is made on the basis that the services an artist can render
are of a special intellectual character giving them a peculiar value
(clause 7). In order to ascertain, therefore, what professional services
any particular artist had contracted to render under the agreement,
it would be necessary to ascertain what particular professional
services the artist was personally qualified to render, and what
particular parts had been assigned to him in a particular production.
In the case of the appellants the general provisions of the agreement,
would also have to be adapted to the fact that the services which
they had agreed to render were their joint professional services.