Where were Passaggi celebrants trained?

Clarissa and Sarah received their initial training from the Fellowship of Independent Celebrants (FOIC) in the UK, while Giulia and Aldo were trained under Cerimonie Uniche and Renata under Federcelebranti in Italy, Clarissa is also an accredited funeral celebrant with Humanists UK and she is currently training celebrants for the National Association of professional celebrants FederCelebranti.