Articles 21 and 22

1 For the purpose of the application of these articles, the term ``workers" representatives' means persons who are recognised as such under national legislation or practice.2 The terms ``national legislation and practice" embrace as the case may be, in addition to laws and regulations, collective agreements, other agreements between employers and workers' representatives, customs as well as relevant case law.3 For the purpose of the application of these articles, the term ``undertaking" is understood