EUROPEAN COMMUNITIES PUBLIC WORKS CONTRACTS - CLAUSE CONFERRING JURISDICTION ON THE COURT OF JUSTICE - UNILATERAL TERMINATION IN ACCORDANCE WITH THE TERMS OF THE CONTRACT - APPLICATION FOR CANCELLATION OF THE CONTRACTS - INADMISSIBLE - APPLICABLE LAW - INTENTION OF THE PARTIES - CONTRACTUAL LIABILITY - LOSS - ASSESSMENT ( EEC TREATY , ART . 181 ; EAEC TREATY , ART . 153 )