(h)the air-routes by which and the conditions under which aircraft may enter or leave [India] [Substituted by Act 24 of 1948, Section 3, for " the Provinces" (w.e.f. 12.4.1948). ], or may fly over [India] [Substituted by Act 24 of 1948, Section 3, for " the Provinces" (w.e.f. 12.4.1948). ], and the places at which aircraft shall land;