https://www.bcaun.com/portugal-law/2026-10-23 https://www.bcaun.com/portugal-law/foreigners/2026-10-23 https://www.bcaun.com/portugal-law/lei-23-2007/2026-10-23 https://www.bcaun.com/portugal-law/lei-37-1981/2026-10-23