For them to be seen as part of the EU by this packages and therefore be charged VAT when receiving below threshold goods from the rest of the EU the area needs its VAT rates defined.
I have done my best to determine these but without being a Portugese speaker I'm struggling to go back beyond 2013.
The Azores are part of the EU VAT area as per https://ec.europa.eu/taxation_customs/business/vat/eu-vat-rules-topic/territorial-status-eu-countries-certain-territories_en.
For them to be seen as part of the EU by this packages and therefore be charged VAT when receiving below threshold goods from the rest of the EU the area needs its VAT rates defined.
I have done my best to determine these but without being a Portugese speaker I'm struggling to go back beyond 2013.
Sources 2014-01-01: https://www.avalara.com/vatlive/en/vat-news/portugals-azores-raises-vat-18.html 2015-07-01: https://www.avalara.com/vatlive/en/vat-news/portugal-azores-reduced-vat-rates-decreased.html
For this to work correctly require the Azores/Madeira postcode PR #63