MOTHER: WILL YOU CLEAN YOUR ROOM?
SON: I won’t!
MOTHER: You have! I’m in charge!
SON: And why do I have to do what you say?
MOTHER: It is in the Portuguese Civil Code, ARTICLE 128.

(ARTICLE 128 – Duty of obedience)
In everything that is not illegal or immoral, non-emancipated minors must obey their parents or guardian and comply with its precepts.)