TO THE SOCIAL SECURITY SCHEME OF A MEMBER STATE OTHER THAN THAT IN WHICH THE PERSON CONCERNED WORKED , AND TO THE RISKS OF CREATING CONFUSION AND UPSETTING THE BALANCE IN THE DISTRIBUTION OF THE FINANCIAL BURDENS BETWEN MEMBER STATES AS A RESULT OF THE DIFFERENCES BETWEEN NATIONAL LAWS GOVERNING THE CONDITIONS OF AFFILIATION , THE BRANCHES OF INSURANCE OR THE SYSTEMS OF CONTRIBUTION .
18 THE COMMISSION CONSIDERS THAT THE SECOND QUESTION SHOULD BE ANSWERED BY REFERENCE TO THE SCHEME OF REGULATION NO 1408/71 AND THE PURPOSE OF TITLE II THEREOF , WHICH IS TO PREVENT MORE THAN ONE NATIONAL LEGISLATIVE SYSTEM FROM BEING APPLICABLE . WITH REGARD TO THE PRINCIPLE OF THE INVIOLABILITY OF RIGHTS ACQUIRED UNDER NATIONAL LAW , THE COMMISSION POINTS OUT THAT IT CAN APPLY ONLY TO THE SUBSTANTIVE RULES GOVERNING COORDINATION IN TITLES I AND III OF REGULATION NO 1408/71 , AND NOT TO TITLE II , WHICH REGULATES CONFLICTS OF LAW . NO INCOMPATIBILITY BETWEEN COMMUNITY LAW AND NATIONALLY-ACQUIRED RIGHTS CAN ARISE SINCE THE RULES OF COMMUNITY LAW , AS THE CONFLICT RULES APPLICABLE IN THE MATTER , CANNOT COME INTO CONFLICT WITH THE NATIONAL STATUTORY PROVISIONS WHOSE RESPECTIVE FIELDS OF APPLICATION THEY IN FACT DETERMINE . FINALLY , THE COMMISSION NOTES THAT THE DOCTRINE THAT RIGHTS ACQUIRED UNDER NATIONAL LAW ARE INVIOLABLE , WHICH IS BASED ON REGULATION NO 3/58 , CANNOT BE APPLIED AS SUCH TO THE INTERPRETATION OF THE WORDING OF REGULATION NO 1408/71 , WHICH HAS DELIBERATELY BEEN COUCHED IN DIFFERENT TERMS , AND THAT THE APPLICATION OF THAT DOCTRINE WOULD LEAD TO CONSIDERABLE UNCERTAINTY IN PRACTICE .
19 IN THAT REGARD IT MUST BE BORNE IN MIND THAT , ACCORDING TO A CONSISTENT LINE OF DECISIONS OF THE COURT , THE AIM OF THE PROVISIONS OF TITLE II OF REGULATIONS NO 3/58 AND NO 1408/71 , WHICH DETERMINE THE LEGISLATION APPLICABLE TO WORKERS MOVING WITHIN THE COMMUNITY , IS TO ENSURE THAT THE PERSONS CONCERNED SHALL BE SUBJECT TO THE SOCIAL SECURITY SCHEME OF ONLY ONE MEMBER STATE , IN ORDER TO PREVENT MORE THAN ONE NATIONAL LEGISLATIVE SYSTEM FROM BEING APPLICABLE AND TO AVOID THE COMPLICATIONS WHICH MAY RESULT FROM THAT SITUATION .
20 THAT PRINCIPLE , WHICH WAS APPLIED BY THE COURT IN RELATION TO REGULATION NO 3/58 , IS EXPRESSED IN ARTICLE 13 ( 1 ) OF REGULATION NO 1408/71 , WHICH PROVIDES THAT ' A WORKER TO WHOM THIS REGULATION APPLIES SHALL BE SUBJECT TO THE LEGISLATION OF A SINGLE MEMBER STATE ONLY ' AND THAT THAT LEGISLATION ' SHALL BE DETERMINED IN ACCORDANCE WITH THE PROVISIONS OF THIS TITLE ' , THAT IS TO SAY TITLE II ON ' THE DETERMINATION OF THE LEGISLATION APPLICABLE ' .
21 THE PROVISIONS OF TITLE II CONSTITUTE A COMPLETE SYSTEM OF CONFLICT RULES THE EFFECT OF WHICH IS TO DIVEST THE LEGISLATURE OF EACH MEMBER STATE OF THE POWER TO DETERMINE THE AMBIT AND THE CONDITIONS FOR THE APPLICATION OF ITS NATIONAL LEGISLATION SO FAR AS