(a) An initial, supplemental, or final statement which is deemed deficient by the Assistant Attorney General must be amended upon his request. Such amendment shall be filed upon a form provided by the Registration Unit and shall identify the item of the statement to be amended.

(b) A change in the information furnished in an initial or supplemental statement under clauses (3), (4), (6), and (9) of section 2(a) of the Act shall be by amendment, unless the notice which is required to be given of such change under section 2(b) is deemed sufficient by the Assistant Attorney General.