By Huw Jones LONDON (Reuters) – The European Union on Tuesday signed up to a new international treaty for recognising and enforcing civil and commercial court rulings among its signatories to reduce costly cross-border litigation. “It will allow EU citizens and businesses to have rulings by a court in the EU recognised and enforced in non-EU participating countries,” a statement from EU states said on Tuesday. “It will also ensure that third country judgements are recognised and enforced in the EU only where fundamental principles of EU law are respected.” The EU will be the first party to acc…