Negotiable instruments framework governs promissory notes, bills and cheques while preserving specified local usages and savings. The Act governs negotiable instruments-promissory notes, bills of exchange and cheques-by defining their legal character and scope; it applies across the territorial jurisdiction while preserving specified pre existing currency statutes and local usages for instruments in oriental languages, subject to exclusion where the instrument expresses an intention that the Act govern the parties' legal relations, and specifies its commencement date.