Representatives of members at meetings convened by specialized agencies, while exercising their functions and during their journeys to and from the place of meeting, and officials within the meaning of section 18, shall not be required by the territorial authorities to leave the country in which they are performing their functions on account of any activities by them in their official capacity. In the case, however, of abuse of privileges of residence committed by any such person in activitic~ in that country outside his official functions, he may be required to leave by the Government of that country provided that: cialisec, Jes sursis d'appcl qui pourra1ent etre neccssaires cn vuc d'cviter !'interruption d'un seivice essentiel. Section 21 Outre ks privilrgcs et immunites prcvus aux sections 19 et 20, le directeur general de chaque imtitution spt'cialisee, ainsi quc tout fonctionnaire agissant en son nom pendant son absence, tant en ce qui enfants mineurs, jouira des privileges, immunites, exemptions et facilitcs accordes, conformemcnt au droit intcrnation;il, aux envoyes diµlomatiques. Section 22 fonctionnaires uniqncmcnt clans l'intcret des institutions spccialisfrs et non pour !cur benefice personnel. Chaque institution specialisce pourra et dcvra lever l'irnmunite accordec a un fonctionnaire clans tous Jes cas ou, a son avis, cette immunite cmpecherait que justice ne soit faite et ou l'immunite peut etre levec sans porter prejudice aux interets de l'institution specialisec. Section 23 Chaque institution spccialisee collaborera en tout membres en vue de faciliter la bonne administration de la justice, d'assurer !'observation des reglements de police et d'eviter tout abus auquel pourraicnt dormer lieu lcs privileges, immunitcs et facilites enumeds au present article.