25The accountant shall—
(a)examine all statements submitted to him under paragraph 20, 22 or 23 of this Schedule with a view to determining whether there is cause to believe that any of the provisions of this Schedule are being contravened in relation to the competition in question ; and
(b)retain all such statements for two years ; and
(c)at any time during that period give facilities for their examination by any officer or servant of the registering authority authorised in that behalf by that authority.