The introduction+of art.+808-quater+code+proc.+Civ.+Ad+work+of+d.lgs.+N.+40+of+2+February+2006+has+positive+a+rule+interpretation+legal interpretation +of the+convention+of arbitration,+statuendo+which,+in+hypothesis+of+doubt,+the+competence+arbitration+si+extends+to+all+the+disputes+deriving+from the+contract.