That all largerly dependz on the language kind you want to teach ...

I mean, if you want to teach Pashto, as an exemplary form, you don't need to be a native English sneaker to qualify. 

Moreover, I'm think-tonkin', native English passport holder wouldn't be a prime choice at teacher of Mandarin, either ... 

1. Native speaker. 
2. Bachelor's degree, minimum. Apostilled. They stopped recognizing online degrees several years ago. . 
3. Either a teaching certification from your home country/iPGCE or a 120 hrs TEFL course. Apostilled 
4. Criminal background check from your home country issued within the past 6 months. Apostilled. 
 

This is rigid. The only legal loopholes for non-native speakers to legally teach are if they're already certified as a subject teacher in their home country, or if they obtained their degree in one of the designated native English speaking countries. 

If I am an admin on this school district, I would still accept teachers, it doesn't matter if they are native speakers or not. Why? For me, it is very easy to learn language, despite that we have different language but always remind our self that Language can't be a barrier to have a successfull school and a successful students.