Greetings Sir,

According to the High court of India, it is the place where the student is residing for a certain amount of time (current residence that she is holding) is what determines the nativity/domicile of the candidate. However, there are seats reserved only under the Army quota but that is totally different here.

Moreover 85% of seats are reserved under the home state quota and 15% under the All india quota so everyone from anywhere can apply keeping in mind these two procedures of counselling criterions. To put simply, in a certain state, the residing (state) candidates are considered first then the non state residents. If she's a resident of Kerala she will fall under the home state quota and to apply in colleges of other states she will be admitted via All india quota and vice versa.

You can check the domicile criterions here:

https://www.thehindu.com/news/national/kerala/medical-admissions-ceeannounces-domicile-criteria/article20649003.ece

If you want to know which colleges she has more chances of getting an admission, kindly visit this link: