I'm starting things, as while I've lived in many States, I have limited specific OK info: Generally any area will have rules requiring any residence within a regulating jurisdcition, to have a certificate of Occupany (a CO), to be considered habitable - hence, rentable for habitation. Again generally, to get a CO means it must have some type of approved waste system. It may not be a septic tank, and in fact in many areas a septic tank is not allowed and considered a health hazard. It can be a hook up to city systems or other methods as well. Much of OK is somewhat rural and, if there aren't any regulations in your area for housing, one should be able to rent whatever someone would like to rent, regardless of systems. Although I wonder what happens to the waste if there is absolutely no system to get rif of it? If a system is required and doesn't exist, so you shouldn't be occupying the property, you may have an action against the landlord. But for your losses in having to move to another property. You can always sue, but to have a supportable action against them for health problems caused by not having a system, you would have to show 1)You had health problems and a loss. 2) They were absolutely caused (positively, not by saying it couldn't be anything else) by the lack of a system. 3) You did what you could to limit the loss, which would mean you probably better have left the place as soon as you discovered the hazard. It would obviously help your case if you could also show you had no reason to believe the system wasn't there when you moved in.
With a legally binding tenancy then no.
No you may not leave at 16 in Oklahoma. Until you are an adult, 18, you live where they say you live.
In Oklahoma, the legal age of majority is 18. If you are 16 and wish to move out without parental permission, you would need to be legally emancipated by the court. Emancipation grants you the rights of an adult and releases your parents from their legal obligations towards you.
That would not be legally allowed. She has to have permission or a court order.
Yes, but seek legal counsel on how best to do it. If you don't have the protection of the law, the landlord could steal or destroy any and all of your property that he can. If it isn't the landlord breaking in, the landlord is legally obligated to provide reasonable assitance to help you protect your property.
Without the tenant knowing? Certainly. Being sued often comes as a surprise. Without the landlord knowing? ... that would be more difficult, but it's possible that someone in the landlord's office initiated the suit based on standard policy without the landlord being personally aware of the details.
can a landlord change the locks on a commercial building without notice
NO
Indentured servant.
Yup. But to do this legally, you have to marry a cow and have three children with a single sheep. ( before moving out.)
Yes.
Yes.