Section 7. Powers to obtain information regarding materials, plant or processes.

The Central Government may, by notice in writing served on any person, require him to make such periodical and other returns, or statements at such times and containing such particulars and accompanied by such plans, drawings, and other documents as may be specified in the notice relating to-- (a) any prescribed substance, specified in the notice, in his possession or under his control or present in or on any land or mine owned or occupied by him which in the opinion of the Central Government is or can be a source of any of the prescribed substances, including returns in respect of any such land or mine; (b) any plant in his possession or under his control designed for mining or processing of minerals so specified, or adapted for the production or use of atomic energy or research into matters connected therewith; (c) any contract entered into by him or any licence granted by or to him relating to prospecting or mining of minerals so specified or the production or use of atomic energy or research into matters connected therewith; (d) any other information in his possession relating to any work carried out by him or on his behalf or under his directions, in connection with prospecting or mining of materials so specified or the production or use of atomic energy or research into matters connected therewith.