You need to seek approval all the way to the Perm Sec through HR with your supervisor and Director's support. The declare a whole bunch of stuff by submitting all your business accounts and statements etc. Very troublesome and it affects your security clearance especially if you have bank loans. I have seen the rare and determined few who managed to get approval, but more often than not you will be rejected after going through all that trouble. If you are working in the security agencies, don't even bother trying.