The regulations may--
(a) amend Schedule 1 by adding the name or description of anything, or
(b) amend Schedule 1 by omitting the name or description of anything, or
(c) amend Schedule 1 by amending the name or description of anything for the purpose of more accurately describing the thing concerned, or
(d) omit Schedule 1 and insert in its place a Schedule containing the names or descriptions of anything.