Public procurement is the purchase of goods or services by public bodies. This Practice note considers the European Union obligations imposed on purchasing authorities to award contracts on an open, competitive and non-discriminatory basis. The options available to a supplier of goods or services where a purchaser does not comply with EU procurement rules are also explored. This note is being reviewed and revised to reflect the 2014 EU Procurement Directives (see Practice note, Reform of the EU public procurement regime). For the implementation of the EU public procurement rules in the UK (where there has been early implementation of the new Directives) see Practice note, Public procurement in the UK.