Let me explain that one,
Generally, and I mean generally. The entirety of the territory puts having having sex with anything under 15 as Child Rape. 15-18 has some gray areas in which it might be considered statutory rape, which translates to "It won't be automatically prosecuted unless her or the family complains about it". Some states appear with alleged age of consents as low as 13 because there are some indigenous communities in the middle of nowhere where it is customary for girls to get married at that age to just about anyone. Since they are allowed to create their own laws based on "use and costumes" it creates shady situations like this one,
where a girl that ran away the day of her arranged wedding, after being sold for approximately 10 000 USD, to a much older man and was apprehended by local authorities. Only to be rescued by federal policemen. I guess there should be cases where situations like this go to the supreme court to see if shit like that, which obviously goes against the individual's bill of rights but is allowed under other constitutional amendments which grant autonomy to indigenous communities, should be allowed. But I guess no one wants to open that can of worms.
But human rights NGO's (And the general populace) are permanently seething about this. While their apologist cry it's colonialism or some bullshit like that.