Consult:
- Consultation on draft addenda to the ITED Manual (3rd edition) and the ITUR Manual (2nd edition) https://www.anacom.pt/render.jsp?contentId=1409608
See also:
- Aviso n.º 15409/2017, publicado a 21 de dezembro https://www.anacom.pt/render.jsp?contentId=1425153