IN THE SAME STATE OR HAVE UNDERGONE WORKING OR PROCESSING AS SPECIFIED IN ARTICLE 1 HAVE REASONABLE DOUBT AS TO THE AUTHENTICITY OF THE DOCUMENT OR AS TO THE ACCURACY OF THE INFORMATION REGARDING THE TRUE ORIGIN OF THE PRODUCTS IN QUESTION .
2 . FOR THE PURPOSE OF APPLYING THE PROVISIONS OF PARAGRAPH 1 , THE AUTHORITIES MENTIONED IN THAT PARAGRAPH SHALL SEND THE CERTIFICATE OF ORIGIN FORM A TO SIECA INDICATING , WHERE APPROPRIATE , THE REASONS OF FORM OR SUBSTANCE FOR AN ENQUIRY . THEY SHALL FORWARD ANY AVAILABLE INFORMATION WHICH TENDS TO SHOW THAT THE PARTICULARS ON THE SAID CERTIFICATE ARE INACCURATE .
ARTICLE 8
1 . RETROSPECTIVE VERIFICATION OF THE CERTIFICATES FORM A MENTIONED IN ARTICLE 4 SHALL BE CARRIED OUT IN THE CIRCUMSTANCES SPECIFIED IN ARTICLE 13 OF THE BASIC REGULATION . HOWEVER , BY WAY OF DEROGATION FROM THE PROVISIONS OF PARAGRAPH 2 OF THAT ARTICLE , THE RELEVANT CUSTOMS AUTHORITIES IN THE COMMUNITY SHALL RETURN THE CERTIFICATE OF ORIGIN FORM A TO SIECA .
2 . THE CACM COUNTRIES SHALL COMMUNICATE TO THE COMMISSION THE ADDRESS OF SIECA . THE COMMISSION SHALL COMMUNICATE THIS INFORMATION TO THE CUSTOMS AUTHORITIES OF THE MEMBER STATES .
ARTICLE 9
THE EXPLANATORY NOTE ANNEXED TO THIS REGULATION FORMS AN INTEGRAL PART THEREOF .
ARTICLE 10
THIS REGULATION SHALL ENTER INTO FORCE ON THE THIRD DAY FOLLOWING ITS PUBLICATION IN THE OFFICIAL JOURNAL OF THE EUROPEAN COMMUNITIES .
IT SHALL APPLY FROM 1 JANUARY 1984 .
THIS REGULATION SHALL BE BINDING IN ITS ENTIRETY AND DIRECTLY APPLICABLE IN ALL MEMBER STATES .
DONE AT BRUSSELS , 23 DECEMBER 1983 .
FOR THE COMMISSION
KARL-HEINZ NARJES
MEMBER OF THE COMMISSION
ANNEX
EXPLANATORY NOTE TO ARTICLE 1
FOR THE PURPOSES OF ARTICLE 1 ( 1 ) ( B ) , THE PERCENTAGE RULE MUST BE OBSERVED BY REFERRING AS REGARDS THE ADDED VALUE ACQUIRED TO THE PROVISIONS CONTAINED IN LISTS A AND B REFERRED TO IN ARTICLE 3 OF THE BASIC REGULATION .
WHERE THE PRODUCTS OBTAINED APPEAR IN LIST A , THE PERCENTAGE RULE THEREFORE CONSTITUTES A CRITERION ADDITIONAL TO THAT OF CHANGE OF TARIFF HEADING FOR ANY NON-ORIGINATING PRODUCT USED .