in international trade or commerce, in a form which accords with a usage of which the parties are or ought to have been aware and which in such trade or commerce is widely known to, and regularly observed by, parties to contracts of the type involved in the particular trade or commerce concerned.
i dtrádáil nó tráchtáil idirnáisiúnta, a bheith i bhfoirm atá de réir gnáthaimh ar a bhfuil eolas nó ar ar cheart go mbeadh eolas ag na páirtithe agus a bhfuil aithne fhorleathan air sa trádáil nó sa tráchtáil sin agus a leantar go rialta é i measc páirtithe i gconarthaí den saghas a bhaineann leis an trádáil nó an tráchtáil áirithe atá i gceist.