See Fair Work Act 2009 s.207
If an agreement covers a single employer:
- the employer
- the employees employed at the time who are covered by the agreement, and
- the employees employed at the time who will be covered by the agreement if the variation is approved;
may jointly make a variation of the enterprise agreement.
If an agreement covers two or more employers:
- ALL of those employers
- the employees employed at the time who are covered by the agreement, and
- the employees employed at the time who will be covered by the agreement if the variation is approved;
may jointly agree to make a variation of an enterprise agreement.
A variation of an enterprise agreement has no effect unless it is approved by the Fair Work Commission.
Limitation – greenfields agreement
A greenfields agreement can only be varied by agreement if one or more of the persons who will be necessary for the normal conduct of the enterprise concerned, and are covered by the agreement, have been employed.