(a) Within an outer boundary which, except so far as is otherwise provided in section 39, sub- section (4), may extend to a distance of two thousand yards from the crest of the outer parapet of the work,-
no variation shall be made in the ground- level, and no building, wall, bank or other construction above
the ground shall be maintained, erected, added to or altered otherwise than with the written approval of the 1[ General Officer Commanding the District], and on such conditions as he may prescribe;
no wood, earth, stone, brick, gravel, sand or other material shall be stacked, stored or otherwise accumulated: Provided that, with the written approval of the 2[ General Officer Commanding the District] and on such conditions as he may prescribe, road- ballast, manure and agricultural produce may be exempted from the prohibition: Provided also that any person having control of the land as owner, lessee or occupier shall be bound forthwith to remove such road- ballast, manure or agricultural produce, without compensation, on the requisition of the Commanding Officer;
no surveying operation shall be conducted otherwise than by or under the personal supervision of a public servant duly authorised in this behalf, in the case of land under the control of military authority, by the Commanding Officer and, in other cases, by the Collector with the concurrence of the Commanding Officer; and
where any building, wall, bank or other con- struction above the ground has been permitted under clause (i) of this sub- section to be maintained, erected, added to or altered, repairs shall not, without the written approval of the 1[ General Officer Commanding the District], be made with materials different in kind from those employed in the original building, wall, bank or other construction.