I have a couple of questions to which I need your support:

1 -  I have 3 "Account Types" and 3 "User Roles"

Account types : User(default), Party member and Party official 

User Roles : Supporter (Default) , Member and Party Official.

Now what I want to do is to have the Party Official and Member hidden from the selection screen at registration.

http://prntscr.com/2frbsg 

How can I do that?

Thank you