When a procedure has been formulated by Govt, one has to follow the laid down procedure scrupulously. AADHAR NUMBER is a mandatory requirement both for Bank and accounts and for Gas companies. Hence if you are not having AADHAR ALREADY, and if you want to avail subsidy, you have to obtain AADHAR for claiming such subsidy as per mandatory norms.
Now getting AADHAR was made easy, as several AADHAR permanent counters and on line registration was functioning remarkably well.
Search in google with key words "Obtaining AADHAR CARD' and learn the procedure and obtain AADHAR for entire family members separately .