You can get the approval from :
Luchtvaart dienst bedrijfserkenningen
Ann Reynaert
CCN
Vooruitgangstraat 80 bus
1030 Brussel
email :
[email protected]
They need copies of certificate of registration, permit to fly and insurancecertifcate
If you email everything you should receive your permission by email within a week.
The bill (82 euro) will be send a couple months after you receive the permission which is valid 1 year