Only certain categories of people are eligible to register as postal voters. The Representation of the People Act-1950 (RPA) section 20(8) allows postal ballots for people on polling duty; members of the armed forces and state police as well as their spouses; employees of the Government of India who are officially posted abroad; and the President;, these are also called "service voters". Additionally, people in preventive detention, disabled and those above the age of 65 years old can use postal vote. Prisoners can not vote at all.