42.2. Where it has not been possible to extend a claim obtained by map designation or by conversion of a mining right to cover the total area of a parcel of land as shown on the maps, the area of land subject to the claim must, as soon as possible, be extended so as to include an area corresponding to the total area of a parcel of land shown on the maps provided that the included area is open to map designation in accordance with this Act.
Where parts of a parcel of land shown on the maps are subject to more than one claim, the Minister shall extend one such claim, as determined by a drawing of lots, to include the excess portion of the parcel of land, provided that the included area is contiguous and is open to map designation in accordance with this Act.
However, the holder of the claim extended to include the excess portion of land may, within 60 days from the date of issue of the notice of extension, refuse the extension if it would impose new obligations on the claim holder by reason of the application of section 231.