You can invite anybody you like with the rules of:

1. They must have over 200 hours unless they are a smurf.
2. They are not scammers.
3. They are active at least once a month. (unless you say why your not going to be active.)
4. They are a decent player with a level of understanding to the game.

If they pass all this then you may invite them to the Group

Thank you for reading

MarioRoskito