(5)The Board may, having regard to the convenience of assessees and the interests of revenue, by notification in the Official Gazette, make rules specifying the cases in which, and the circumstances under which, an application may be made for the grant of a certificate under sub-section (3) and the conditions subject to which such certificate may be granted and providing for all other matters connected therewith.] [Inserted by Act 19 of 1970, Section 24 (w.r.e.f. 1.4.1970).]