If you have a proclamation from the govenor and have at least 25 teams or at least 50 teams without a proclamation that makes it a qualifier for the Jack. If there is more than one state championship that meets the requirement or a with cook with 50 team or more then all the winners are put into a draw for that state. As an example Oregon had 3 qualifiers last year, MO had maybe 14, WA had 3. They pick one team from each state during the draw the other winners would not get the invite.
The Royal is set up differently it invites most of the teams that would have won a championship in a state.
There is a new cook, the Greay American Cookout at the Kansas Speedway that you only need 10 teams to make it a qualifier, that number will more than likely go up in the next few years.