Minutes shall be kept of proceedings of the Agency, of its committees and of its sub-committees.

Minutes of any such proceedings shall be evidence of those proceedings if they are signed by a person purporting to have acted as chairman of the proceedings to which the minutes relate or of any subsequent proceedings in the course of which the minutes were approved as a correct record.

Where minutes of any such proceedings have been signed as mentioned in sub-paragraph (2) above, those proceedings shall, unless the contrary is shown, be deemed to have been validly convened and constituted.