Where the owner of any land to which this Act does not apply agrees to grant rights in any pasture or grazing land to the crofters sharing in any common grazing and that owner and the crofters agree that such land will form part of the said common grazing, then as from the date on which such rights are first exercisable by the crofters, the land shall form part of the common grazing, and this Act shall apply accordingly to the common grazing as so enlarged.

The owner of any land which becomes part of a common grazing by virtue of subsection (1) above shall give notice to the Commission of the enlargement of that common grazing.