13The appropriate authority shall not alter, disturb or in any way interfere with any property of the highway authority on or under any highway, or the access thereto, without the consent of the highway authority, and any alteration, diversion, replacement or reconstruction of any such property which may be necessary shall be made by the highway authority or the appropriate authority as the highway authority think fit, and the expense reasonably incurred by the highway authority in so doing shall be repaid to the highway authority by the appropriate authority.