The administering authority may amend, cancel or suspend a temporary emissions licence if—
(a) after granting the licence—(i) the authority receives information that the effects of the release of a contaminant into the receiving environment will be greater than was envisaged by the authority when the licence was issued; or(ii) other applications for temporary emissions licences are made that would, if granted, affect the same environmental values as the issued licence; or
(b) for the amendment of a temporary emissions licence—the holder of the licence gives written agreement to the amendment; or
(c) for the cancellation of a temporary emissions licence—(i) the holder of the licence agrees in writing to the cancellation; or(ii) the holder of the licence gives the administering authority notice of ceasing the activity to which the licence relates.