The Repatriation of Prisoners Act,2003
Section 4. Application for transfer by a prisoner
Any prisoner who is a citizen of a contracting State may make an application to the Central Government for transfer of his custody from India to that contracting State:
Provided that if a prisoner is not able to make an application himself because of his ill health, mental condition, old age or being a minor, then, the application may be made by any other person entitled to act on his behalf.