xmlns:atom="http://www.w3.org/2005/Atom"
4. Any function specified in articles 2(2) or 3 may be exercised—
(a)either wholly or to such extent as may be specified in the authorisation;
(b)either generally or in such cases as may be so specified; and
(c)either unconditionally or subject to the fulfilment of such conditions as may be so specified.