1 . CONVENTION OF 27 SEPTEMBER 1968 - SPECIAL POWERS - MATTERS RELATING TO A CONTRACT - OBLIGATION - CONCEPT ( CONVENTION OF 27 SEPTEMBER 1968 , ARTICLE 5 ( 1 )) 2 . CONVENTION OF 27 SEPTEMBER 1968 - SPECIAL POWERS - MATTERS RELATING TO A CONTRACT - EXCLUSIVE CONCESSION - ACTION BROUGHT BY THE GRANTEE AGAINST THE GRANTOR - CONTRACTUAL OBLIGATION - CONCEPT - COMPENSATION BY WAY OF DAMAGES - ACTION FOR PAYMENT - POWERS OF THE NATIONAL COURT ( CONVENTION OF 27 SEPTEMBER 1968 , ARTICLE 5 ( 1 )) 3 . CONVENTION OF 27 SEPTEMBER 1968 - SPECIAL POWERS - GRANTEE OF AN EXCLUSIVE SALES CONCESSION - CONTROL OF BRANCH , AGENCY OR OTHER ESTABLISHMENT - CRITERIA FOR DISTINCTION ( CONVENTION OF 27 SEPTEMBER 1968 , ARTICLE 5 ( 5 ))