<ul><li><a href=https://dre.pt/dre/detalhe/regulamento/150-2019-119372636 target=_blank>Regulation 150/2019 Regulation of Fees for Services Provided(Regulamento de Taxas de Serviços Prestados da AMT, Adopted 08/02/2019)</a></li><li><a href=https://www.portaldasfinancas.gov.pt/at/html/index.html target=_blank>Website of the Tax and Customs Authority(Autoridade Tributária e Aduaneira, last consulted 08/09/2023)</a></li></ul>