Anti Terror Combat has been taken over by BlackCombat
To join any of these ranks you have to do the following:
If you are already a martial artist and you have any rank which is recognized by the BlackCombat organisation, you can get awarded.
For example: You are a green belt Karate, you will be awarded the white belt
For example: You are a 1. Dan Karate, you can be awarded the 1. Dan BlackCombat
In both cases you must join the BlackCombat organisation and you have one year time to proof, that you are familiar with the requirements of your grade awarded.
It only makes sense to join, if your martial arts background is more from a self defence sort rather than sportif only.
The other way to get any BlackCombat rank is to join a school near you which provides the training and you learn the skills and become graduated.
At the BlackCombat blog you find updates of teachings and seminars worldwide.