++++ 1 . PROCEDURE - PRELIMINARY RULING - NATIONAL COURT OR TRIBUNAL WITHIN THE MEANING OF ARTICLE 177 OF THE EEC TREATY - BODIES ANALOGOUS TO ORDINARY COURTS OF LAW - POWER TO REFER CASES TO THE COURT 2 . PROCEDURE - PRELIMINARY RULING - JURISDICTION OF THE COURT - INTERPRETATION ( EEC TREATY, ARTICLE 177 ) 3 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - SOCIAL INSURANCE - LEGISLATION WITHIN THE MEANING OF REGULATION NO 3 OF THE COUNCIL OF THE EEC - ENFORCEABLE PROVISIONS - CONCEPTS ( REGULATION NO 3 OF THE COUNCIL OF THE EEC, ARTICLE 1(B )) 4 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - SOCIAL INSURANCE - SPECIAL SCHEME WITHIN THE MEANING OF ARTICLE 2(2 ) OF REGULATION NO 3 OF THE COUNCIL OF THE EEC - INQUIRY BY THE NATIONAL COURT INTO THE EXISTENCE OF SUCH A SCHEME - APPLICATION TO SUCH A SCHEME OF THE PROVISIONS OF REGULATIONS NOS 3 AND 4 ( REGULATION NO 3 OF THE COUNCIL OF THE EEC, ARTICLE 2(2 )) 5 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - SOCIAL INSURANCE - APPLICATION OF REGULATION NO 3 OF THE COUNCIL OF THE EEC - NETHERLANDS LEGISLATION - SICKNESS INSURANCE - GENERAL SCHEME AND SPECIAL SCHEMES COVERED ( REGULATION NO 3 OF THE COUNCIL OF THE EEC, ANNEX B, HEADING ' NETHERLANDS ') 6 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - SOCIAL INSURANCE - TERRITORIAL PROVISIONS NOT TO BE APPLIED AGAINST THEM - PERSONS IN RECEIPT OF PENSIONS UNDER THE LEGISLATION OF A MEMBER STATE AND THEIR SURVIVORS - PERMANENT RESIDENCE IN A MEMBER STATE OTHER THAN THE ONE WHERE THE INSTITUTION LIABLE FOR PAYMENT IS SITUATED - AFFILIATION TO THE INSURANCE SCHEME SAFE-GUARDED EVEN WHEN OPTIONAL ( EEC TREATY, ARTICLES 48 TO 51; REGULATION NO 3 OF THE COUNCIL OF THE EEC, ARTICLES 4, 22 ) 7 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - SOCIAL INSURANCE - BENEFITS IN KIND WITHIN THE MEANING OF ARTICLE 22 OF REGULATION NO 3 OF THE COUNCIL OF THE EEC - BENEFITS IN THE FORM OF REIMBURSEMENT OF EXPENSES INCURRED ( REGULATION NO 3 OF THE COUNCIL OF THE EEC, ARTICLE 22 )