16.—(1) The Scottish Ministers may vary a permission granted under these Regulations, in whole or in part.
(2) The Scottish Ministers may do so either–
(a)on the application of a person mentioned in regulation 17(1); or
(b)of their own motion, in the circumstances provided for in regulation 20(1).
(3) Any variation may be made not only to the permission itself but also to any condition to which the permission was subject prior to the variation.