As soon as practicable the returning officer is to, in accordance with approved procedures (a) recheck all counts under sections 141 , 142 and 143 ; and(b) make any necessary amendments to counts resulting from rechecks under paragraph (a) ; and(c) determine and record (i) the total count of informal ballot papers; and(ii) the total counts of first preference votes recorded for each candidate on ballot papers that are not informal ballot papers.