(1) Any request for a counter-analysis pursuant to article 4(2) of the Council regulation shall—
(a) be made in writing to the enforcement authority whose officer took or purchased the sample,
(b) specify either that the counter-analysis is to be performed by a public analyst or that the counter-analysis is to be performed by the Government Chemist, and
(c) be made within 14 days of the date on which a copy of the public analyst's certificate specifying the result of the analysis was served on the person making the request, except that, in the case of a person against whom proceedings are brought for an offence under these regulations in respect of a contravention of article 1(1) of the Council regulation, a request may be made within 14 days of the date on which a notice of intended prosecution was served on him.
(2) If a request for counter-analysis is made, the authorised officer shall submit the poultry carcases which are to be subjected to counter-analysis either to a public analyst or to the Government Chemist in accordance with the choice made in the request pursuant to paragraph (1)(b) of this regulation. The poultry carcases shall not be submitted to the public analyst who performed the analysis.
(3) The public analyst or the Government Chemist, as the case may be, shall analyse as soon as practicable any poultry carcases submitted to him in pursuance of paragraph (2) of this regulation and shall transmit to the authorised officer who submitted the poultry carcases a certificate specifying the result of the counter-analysis.
(4) The authorised officer shall, within 7 days of receipt by him of the certificate specifying the result of the counter-analysis, serve a copy of the certificate on—
(a) the occupier of the slaughterhouse from which the poultry carcases originate, unless the slaughterhouse is outside the United Kingdom.
(b) the person who requested a counter-analysis, if the request was not made by or on behalf of the occupier of the slaughterhouse from which the poultry carcases originate, and
(c) any other person against whom proceedings have been brought for an offence under these regulations in respect of a contravention of article 1(1) of the Council regulation relating to those poultry carcases.
(5) If, in a case where a counter-analysis has been made, an enforcement authority intends to bring proceedings for an offence under these regulations in respect of a contravention of article 1(1) of the Council regulation against any person who has not already been served with a copy of the certificate specifying the result of the counter-analysis under paragraph (4) of this regulation, the authority shall, before the institution of proceedings, cause to be served on that person a copy of that certificate.