(1) The Board shall, ordinarily exercise jurisdiction in regard to any of the projects referred to in sub-section (1) of section 78 over headwork (barrages, dams, reservoir, regulating construction), part of canal network and transmission lines necessary to deliver water or power to the States concerned.
     (2) If any question arises as to whether the Board has jurisdiction under sub-section (1) over any project referred thereto, the same shall be referred to the Central Government for decision thereon.