<ul><li><a href=https://www.riigiteataja.ee/akt/112072014107?leiaKehtiv target=_blank>Postal Act(Postiseadus, RT I 2006 18 142, adopted on 6 April 2006, last amended on 1 July 2017)</a></li><li><a href=http://ec.europa.eu/growth/tools-databases/regprof/index.cfm target=_blank>European Regulated Professions Database</a></li></ul>