(d) an enclosure, a fence or a wall which does not rise higher than five feet above the surface of the land on which it stands; (e) an irrigation work as defined in the law relating to irrigation; Provided further that any permission granted under this section shall not legalize the erection of a structure which is inconsistent with the provisions of any other law. (2) The Executive Committee may in his discretion grant or refuse any permission mentioned in sub-section (1) for which any person has applied and if he grants such permission, he may prescribe the specifications to which the structure to which the permission relates, shall conform and the manner, place and circumstances in which, and the conditions on which the structure shall be erected. (3) When a structure has been erected in contravention of sub-section (1), the Executive Committee may deal with that structure and with the person who erected it or permitted its erection, mutatis mutandis in accordance with the applicable provisions of section four. 9. (1) When the access to, or exit from, a trunk, main or building restriction road situated wholly outside an urban area and wholly outside a township, is barred by a lawfully constructed fence, wall, hedge, trench, ditch or similar obstacle, or beacons of stone, concrete, iron or other permanent material along or near the boundary of the road reserve, no person shall be entitled to gain access to or exit from any land through, under or over that fence, wall, hedge, trench, ditch or other obstacle by means of a gate, bridge, stile, road or other passage, unless the Executive Committee has authorized in writing the construction of the gate, bridge, stile, road or other passage in question: Provided that the provisions of this section shall not apply to any lawfully constructed gate, bridge, stile, road or other passage which existed and was in use at the coming into operation of this Ordinance and which was at no time thereafter closed or removed: Provided further that the Executive Committee shall not withhold his authorization for the construction of any such gate, bridge, stile, road or other passage as aforesaid, which is necessary to give access to, or exit from, a piece of land to which, or from which, no other reasonable access or exit is available or can be made available at reasonable expense, or if- (a) a land surveyor surveyed the said piece of land and lodged a diagram thereof with the Surveyor-General before the coming into operation of this Ordinance or before the date of erection of the fence, wall, hedge, trench, ditch or other obstacle in question; and (b) before the said date, a person other than the owner of any land of which the firstmentioned piece of land may have formed a portion at the time when the said survey and diagram were made, acquired, or entered into an agreement to acquire, the ownership of the piece of land or hired that piece of land on a registered lease for a period of not less than ten years. (2) In granting the authorization mentioned in subsection (1) the Executive Committee may prescribe the nature of the gate, bridge, stile, road or other passage in question and the place where and the manner in which it shall be constructed and may impose such other conditions in connection with it or its use, as he may deem necessary, and if any requirement prescribed or condition imposed in such authorization is not observed, he may withdraw his authorization.