the rules must be respected
'hay que' is impersonal (no specific subject). Followed by infinitive.
In this game, the rules must be respected for it to be fair.
—Can I make an exception? —No, the rules must be respected.
The rules of the community must be respected in order to live in peace.
In this game, the rules must be respected for it to be fair.
—Can I make an exception? —No, the rules must be respected.
The rules of the community must be respected in order to live in peace.