Under the Portuguese Nationality Law number 37/81, citizenship is based on the principle of ius sanguinis, although with this new amendment there are changes towards the principle of ius soli that facilitate the access to citizenship based on this principle, and can be acquired through descent, marriage or naturalisation. In terms of naturalisation, foreigners can be naturalised in Portugal after proving at least five years of legal residency and passing a Portuguese language test (level A2).
Portugal also offers an alternative way to obtain citizenship through its residency by investment program also known as the Portuguese Golden Visa. Under this program an applicant may be granted citizenship after a five-year period of residency and upon fulfilling other minor requirements.
This new amendment is, nevertheless, still subject to regulation by the Government, therefore it is not yet being applied by the competent authorities.
Under Portuguese law dual citizenship is allowed without any special conditions and there are no requirements in relation to the renunciation of original citizenship. This means that Portuguese citizens holding second citizenship do not lose Portuguese citizenship, and similarly those acquiring Portuguese citizenship are not required to renounce their original citizenship.