Hi, I want to apply for a visitor visa for my mother and father they are married and both are Indian citizens. My father is living in India and my mother is temporarily working and living in Saudi Arabia. Do I have to submit one application for a visitor visa? like for example: with my father as a principal applicant and my mother as a dependant, OR I have to submit 2 totally separate applications ? one for my father and another for my mother. please help to clear my doubt.