Nothing in this Part of this Act shall be construed as imposing any liability on any person where in the course of mining or other lawful operations petroleum is set free.

Nothing in this Part of this Act shall be construed as conferring, or as enabling the Secretary of State to confer, on any person, whether acting on behalf of Her Majesty or not, any right which he does not enjoy apart from this Part of this Act to enter on or interfere with land.

The issue of an authorisation within the meaning of Part III of this Act shall be deemed not to derogate from a licence granted under section 3 which is for the time being in force.