(2)If a scheme returned for reconsideration under sub-section (1), is modified by the Municipality, it shall be republished in accordance with the provisions of section 378.(a)In every case in which the modification affects the boundaries of he area comprised in the scheme or involves the acquisition of any land not previously proposed to be acquired; and(b)In every other case, unless the modification is, in the opinion of the Government, not of sufficient importance to require republication.