# Gas Act 1965, Paragraph 3


(1) Subject to this paragraph, any person authorised in writing by a public gas suppliermay at any reasonable time enter upon and survey any land—
(a) for the purpose of preparing any documents to be submitted to the Minister at any stage of the proceedings for the making of a storage authorisation order, or
(b) for the purpose of estimating value, or assessing loss, in connection with any claim for compensation under Part II of this Act.
(2) A person authorised under this paragraph to enter on any land shall not demand admission as of right to any land which is occupied unless twenty-eight days’ notice of the intended entry has been given to the occupier and to the owner of the land.

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Source: https://www.legislation.gov.uk/ukpga/1965/36/schedule/6/paragraph/3 (the official version)
Page: https://openlegislation.uk/gas-act-1965/schedule-6/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.