See Fair Work Act 2009 ss.172(4), 178B
A greenfields agreement is an enterprise agreement relating to a genuine new enterprise (including a new business, activity, project or undertaking) which is made at a time when the employer or employers have not yet employed any of the persons who will be necessary for the normal conduct of the enterprise and who will be covered by the agreement.[1]
When referring to a location, greenfields relates to a location for a business where there has not previously been any building, or relating to any enterprise which is becoming active in a market where there has been little or no previous activity.