You can download the editable 35 ac application form and after filling as per the instruction in the given form, Make 4 sets of this application ( 2 sets- For your office copy and send the balance 2 sets to the below address)
The Secretary, National Committee for Promotion of Social and Economic Welfare, Department of Revenue, Ministry of Finance, Room No. 149, North Block, New Delhi-110 001
After you have sent the application, it will take much time to receive your approval and there are several possibilities to reject your application. So please fill the 35 ac form with due care.