DU TRAVAIL ( LABOUR COURT ), MONS , REFERRED TO THE COURT FOR A PRELIMINARY RULING UNDER ARTICLE 177 OF THE EEC TREATY A NUMBER OF QUESTIONS CONCERNING , ON THE ONE HAND , THE INTERPRETATION OF REGULATION NO 1408/71 OF THE COUNCIL OF 14 JUNE 1971 ON THE APPLICATION OF SOCIAL SECURITY SCHEMES TO EMPLOYED PERSONS AND THEIR FAMILIES MOVING WITHIN THE COMMUNITY ( OFFICIAL JOURNAL , ENGLISH SPECIAL EDITION 1971 ( II ), P . 416 ) AND REGULATION NO 574/72 OF THE COUNCIL OF 21 MARCH 1972 FIXING THE PROCEDURE FOR IMPLEMENTING REGULATION NO 1408/71 ( OFFICIAL JOURNAL , ENGLISH SPECIAL EDITION 1972 ( I ), P . 159 ) AND , ON THE OTHER HAND , AND SECONDARILY , THE VALIDITY OF REGULATION NO 1408/71 IN REGARD TO THE AIMS OF THE TREATY IN GENERAL AND THE TERMS OF ARTICLE 51 THEREOF IN PARTICULAR .
2 THOSE QUESTIONS WERE RAISED IN THE CONTEXT OF A DISPUTE BETWEEN MRS BACCINI AND THE OFFICE NATIONAL DE L ' EMPLOI ( NATIONAL EMPLOYMENT OFFICE ) OF BELGIUM .
3 MRS BACCINI , AN ITALIAN NATIONAL , WORKED IN ITALY AND THEN IN BELGIUM . SHE RECEIVED AN INVALIDITY ALLOWANCE IN BELGIUM AS FROM 5 JULY 1973 .
4 IN ACCORDANCE WITH THE PROVISIONS OF REGULATION NOS 1408/71 AND 574/72 OF THE COUNCIL THE INSTITUT NATIONAL D ' ASSURANCE MALADIE-INVALIDITE OF BELGIUM ( HEREINAFTER REFERRED TO AS ' ' THE BELGIAN INSTITUTION ' ' ) INFORMED THE ISTITUTO NAZIONALE DELLA PREVIDENZA SOCIALE ( HEREINAFTER CALLED ' ' THE ITALIAN INSTITUTION ' ' ) OF ITALY OF MRS BACCINI ' S INVALIDITY . ACCORDING TO PARAGRAPH ( 3 ) ( WHICH HAS SINCE BECOME PARAGRAPH ( 4 )) OF ARTICLE 40 OF REGULATION NO 1408/71 , ' ' A DECISION TAKEN BY AN INSTITUTION OF A MEMBER STATE CONCERNING THE DEGREE OF INVALIDITY OF A CLAIMANT SHALL BE BINDING ON THE INSTITUTION OF ANY OTHER MEMBER STATE CONCERNED , PROVIDED THAT THE CONCORDANCE BETWEEN THE LEGISLATIONS OF THESE STATES ON CONDITIONS RELATING TO THE DEGREE OF INVALIDITY IS ACKNOWLEDGED IN ANNEX IV ' ' . BEFORE COUNCIL REGULATION NO 2793/81 ( OFFICIAL JOURNAL L 275 , P . 1 ), WHICH AMENDED REGULATION NO 1408/71 , CAME INTO EFFECT ON 18 SEPTEMBER 1981 , ANNEX IV ACCEPTED THE CONCORDANCE BETWEEN THE BELGIAN AND ITALIAN LEGISLATION ON CONDITIONS RELATING TO THE DEGREE OF INVALIDITY .
5 IN VIEW OF THE INFORMATION WHICH IT HAD RECEIVED FROM THE BELGIAN INSTITUTION ON MRS BACCINI ' S CONDITION AND WHICH WAS BINDING UPON IT BY VIRTUE OF THE PROVISIONS OF REGULATION NO 1408/71 CITED ABOVE AND ANNEX IV THERETO , THE ITALIAN INSTITUTION AWARDED HER AS FROM 1 AUGUST 1974 AN INVALIDITY PENSION WHICH , HAVING REGARD TO THE FACT THAT MRS BACCINI HAD WORKED IN ITALY AND BELGIUM , WAS AGGREGATED AND APPORTIONED IN ACCORDANCE WITH THE PROCEDURE LAID DOWN BY REGULATION NOS 1408/71 AND 574/72 .
6 THE MEDICAL OFFICER OF THE COMPETENT