5(1)Any expropriating authority or, with an order in writing from the Officer and subject to his direction including the requiring of security for compensation, any other person may, without the consent of the owner, enter upon any land to ascertain its suitability for the purposes for which its expropriation is required, and may make surveys, take levels and make such borings, sink such trial pits or conduct such other tests as are necessary to ascertain the suitability of the land.