Consulte:
- ECC/DEC/(02)05 https://www.anacom.pt/render.jsp?contentId=634459
- ECC/DEC/(05)05 https://www.anacom.pt/render.jsp?contentId=634458
- ECC/DEC/(06)12 https://www.anacom.pt/render.jsp?contentId=634443
- ECC/DEC/(06)08 https://www.anacom.pt/render.jsp?contentId=634442
- ECC/DEC/(06)07 https://www.anacom.pt/render.jsp?contentId=634441
- ECC/DEC/(07)01 https://www.anacom.pt/render.jsp?contentId=634379