420. Entry on land.

Where it appears to the appropriate national authority1 to be expedient that any land2 should be prospected: (1) for the purpose of ascertaining whether it contains coal3 suitable for working by opencast operations4, and, if so, what quantity of such coal it contains, and how the coal in question could best be so worked; or (2) for the purpose of ascertaining whether the land would be suitable for use for any purposes connected with the working of coal on any adjacent land by opencast operations, including purposes of access and of restoring land affected by the working of coal