(1)  The Head of Faculty may, by instrument in writing, amend or revoke a general authorisation at any time.

(2)  The amendment or revocation takes effect on –

(a) the day on which the instrument is executed; or

(b) such later day as is specified in the instrument.

(3)  If the instrument is to effect an amendment of the general authorisation, the amendment may involve all or any of the following:

(a) the placement of a new condition on the authorisation;

(b) the alteration of an existing condition of the authorisation;

(c) the omission of an existing condition from the authorisation.