The Commission may make an award in respect of –

(a) all State employees employed in one or more Agencies; or

(b) all employees employed in a State authority that is not an Agency; or

(c) classes of State employees employed in one or more Agencies; or

(d) classes of employees employed in one or more State authorities that are not Agencies; or

(e) all or any employees employed in an enterprise; or

(f) any combination of the categories of employees referred to in paragraphs (a) to (e) .