protocol measur field social secur relat transit period free movement person switzerland liechtenstein articl purpos appli protocol regul eec june applic social secur scheme emploi person emploi person member famili move commun oj season worker switzerland liechtenstein worker nation ec member state efta state holder season permit sens nation legisl switzerland liechtenstein maximum period month articl period valid permit season worker entitl unemploy benefit swiss liechtenstein legisl condit nation switzerland liechtenstein provis regul eec articl part unemploy contribut paid season worker reimburs switzerland liechtenstein state resid worker procedur state total amount contribut establish number season worker nation state present switzerland liechtenstein end august averag length season wage rate contribut swiss liechtenstein unemploy insur share employ worker amount reimburs state correspond fifti cent total amount contribut calcul subparagraph reimburs made total number season worker resid state concern exce account period switzerland liechtenstein articl provis reimburs unemploy contribut contain convent unemploy insur conclud switzerland franc convent decemb itali convent decemb feder republ germani convent novemb austria convent decemb princip liechtenstein convent januari continu appli transit period articl valid protocol limit length transit period defin protocol