Submissions are open on a proposal under which 9500ha of high country land, near Omarama, could become conservation land.
A preliminary proposal has been developed for Dunstan Downs, a 12,300ha Crown pastoral lease farmed by the Innes family, which is one of 28 properties in tenure review.
While the Government made the decision to end tenure review in 2018, it was ongoing until changes to the Crown Pastoral Land Act came into effect.
Tenure review is a voluntary process that gives lessees an opportunity to buy some of their leasehold land from the Crown while the remainder returns to the Crown for conservation.
If the proposal went ahead, 9500ha, including part of the St Bathans Range, would contribute to nearby conservation areas and reserves, Commissioner of Crown Lands Craig Harris said in a statement.