A proclamation on investiture of Suthida, queen consort of Vajiralongkorn, dated 1 May 2562 <a href="https://en.wikipedia.org/wiki/Buddhist_Era" class="extiw" title="w:Buddhist Era">BE</a> (2019 <a href="https://en.wikipedia.org/wiki/Common_Era" class="extiw" title="w:Common Era">CE</a>), as published in the <i><a href="https://en.wikipedia.org/wiki/Royal_Thai_Government_Gazette" class="extiw" title="w:Royal Thai Government Gazette">Royal Thai Government Gazette</a></i> on the same day.
Government of Thailand
2019-05-01
"<a rel="nofollow" class="external text" href="http://www.ratchakitcha.soc.go.th/DATA/PDF/2562/B/011/T_0001.PDF">Prakat rueang sathapana somdet phra rachini long wan thi nueng phruetsaphakhom song phan ha roi hoksip song</a>" [Proclamation on investiture of Her Majesty the Queen Consort dated 1 May 2562]. (2019, 1 May). <i>Royal Thai Government Gazette</i>. Volume 136, Part 11 B. Page 1.