joint declar european parliament council commiss european parliament council commiss treati establish european commun base principl respect law court justic recogn law compris rule embodi treati secondari commun legisl gener principl law fundament right principl right constitut law member state base member state contract parti european convent protect human right fundament freedom sign rome novemb adopt declar european parliament council commiss stress prime import attach protect fundament right deriv constitut member state european convent protect human right fundament freedom exercis power pursuanc aim european commun respect continu respect right luxembourg dai april year thousand hundr seventi european parliament colombo council owen commiss jenkin