Excerpt:

TITLE I

Attribution, acquisition and loss of nationality

CHAPTER I

Attribution of nationality

Article 1

Nationality by origin

1 – Portuguese by origin are:
a) The children of a Portuguese mother or father born in Portuguese territory;
b) The children of a Portuguese mother or father born abroad if the Portuguese parent is there serving the Portuguese State;
c) The children of a Portuguese mother or father born abroad if they have their birth registered at the Portuguese civil registry or if they declare that they want to be Portuguese;
d) The persons born in Portuguese territory to foreign parents if at least one of the parents was also born in Portugal and resides here, irrespective of title, at the time of birth;
e) The persons born in Portuguese territory to foreign parents who are not serving their respective State, if they declare that they want to be Portuguese and provided that one of the parents has legally resided in Portugal for at least five years at the time of birth;
f) The persons born in Portuguese territory who do not possess another nationality.
2 – Save proof to the contrary, the newly-born infants found abandoned in Portugal are presumed to have been born in Portuguese territory.