CASE 618/79 A 1 . OFFICIALS - BUILDING LOANS - AMOUNT EXPRESSED IN BELGIAN FRANCS - REPAYMENT IN THE CURRENCY OF THE COUNTRY WHERE THE PROPERTY TO BE FINANCED IS SITUATED - EXCHANGE RATE APPLICABLE - EXCHANGE RATE DEFINED IN ARTICLE 63 OF THE STAFF REGULATIONS - TRANSFERS MADE PURSUANT TO ARTICLE 17 OF ANNEX VII TO THE STAFF REGULATIONS - UPDATING OF THE EXCHANGE RATE DURING THE TERM OF THE LOAN AGREEMENT - APPLICATION OF THE NEW EXCHANGE RATE TO THE SUBSEQUENT MONTHLY REPAYMENT INSTALMENTS ( STAFF REGULATIONS , ART . 63 AND ANNEX VII , ART . 17 ; COUNCIL REGULATIONS NOS 3085/78 AND 3086/78 ) 2.OFFICIALS - BUILDING LOANS - AMOUNT EXPRESSED IN BELGIAN FRANCS - REPAYMENT IN THE CURRENCY OF THE COUNTRY WHERE THE PROPERTY TO BE FINANCED IS SITUATED - EXCHANGE RATE APPLICABLE - EXCHANGE RATE DEFINED IN ARTICLE 63 OF THE STAFF REGULATIONS - ADJUSTMENT OF REMUNERATION DURING THE TERM OF THE LOAN AGREEMENT - REPLACEMENT OF UPDATING OF THE EXCHANGE RATE BY ADJUSTMENT OF THE WEIGHTING - APPLICATION OF THE NEW EXCHANGE RATE TO THE SUBSEQUENT MONTHLY REPAYMENT INSTALMENTS - CANCELLATION OF AGREEMENT NOT JUSTIFIED THEREBY ( STAFF REGULATIONS , ARTS 63 AND 65 ; COUNCIL REGULATIONS NOS 3085/78 AND 3086/78 )