++++ 1 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - CALCULATION OF BENEFITS - APPLICATION OF THE SYSTEM PROVIDED FOR BY ARTICLES 27 AND 28 OF REGULATION NO 3 - THE BENEFICIARY'S OBJECTIVE SITUATION TO BE CONSIDERED 2 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - SYSTEM BASED ON INSURANCE PERIODS - AMOUNT OF RETIREMENT PENSION VARYING SOLELY ACCORDING TO INSURANCE PERIODS COMPLETED - RIGHTS TO A PENSION ACQUIRED BY CLAIMANT WITHOUT AGGREGATION OF COMPLETED PERIODS - ARTICLES 27 AND 28 OF REGULATION NO 3 NOT APPLICABLE 3 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - SIMULTANEOUS DETERMINATION OF PENSIONS NOT OBLIGATORY ( REGULATION NO 3, ARTICLE 28 ) 4 . FREE MOVEMENT OF PERSONS - MIGRANT WORKERS - OLD-AGE AND DEATH ( PENSIONS ) INSURANCE - APPLICATION OF THE SYSTEM ESTABLISHED BY REGULATION NO 3 - GUARANTEE FOR PERSONS CONCERNED OF BENEFITS ACQUIRED BY VIRTUE OF THE LEGISLATIVE SYSTEMS OF MEMBER STATES - OPTIONS GRANTED BY SUCH LEGISLATION - WAIVER NOT REQUIRED - TIME FOR EXERCISING OPTIONS DETERMINED BY NATIONAL LEGISLATION ( REGULATION NO 3, ARTICLES 27 AND 28 )