(b)in any disturbance area which is outside the area specified in clause (a), the Deputy Commissioner of the Revenue District or any other authority, to recover the amount (hereinafter called "the compensation amount") as determined under sub-section (3) either in whole or in part, and where the municipal body is required to recover such amount, an additional sum not exceeding three per cent of the compensation amount (hereinafter referred to as "the municipal recovery cost") generally from all persons who were inhabitants of the disturbance area or specially from any particular section or sections, or class or classes of such persons in the said area, and in such proportion as the District Magistrate may direct.