Then there should only be 2 tiers, Casual and Serious. Any more than that and you'll end up with unfavorable labels that end up killing a series because nobody will want to join a lower tier league. Those are self explanatory too, Casual implies any skill level is welcome and the emphasis is on developing skills while Serious has emphasis on both driving and tuning and has tight competition.
I firmly believe that simpler is better and the less you ask or require of drivers/members the more successful it will be. So a league sanctioning process could be something like this:
A league director fills out the necessary Google doc to submit their league. An ORB official reviews the league thread and looks for things such as organization, clear explanation of format and rules, thorough regulations that cover all foreseeable incidents, procedures and requirements that are easily "police-able", etc. If the ORB Official believes it's up to snuff they will then sit-in on a race to ensure the director handles the race format and group effectively. If the Official approves then the league/club will be Sanctioned.
After that a league director must continue to meet ORB requirements such as maintaining the approved structure (no radical changes during the season), update their thread with results and info in a timely manner, and submit their results and incidents to the ORB in a timely manner. Failure to do so could results in probation or exclusion from the ORB.
Deciding whether it's Casual or Serious should be done based on format (group qualifying vs. live 4 lap qualifying, sprint vs. enduro, low-to-mid hp cars vs. high power cars/race cars, length of season). Ranking them based on competition of participants is tricky because this could vary from race to race. Maybe after 5 races a league could be reviewed and if it proves to consistently attract fast drivers and produce very close racing it could be given a Star Rating(Casual* or Serious*) to indicate a level of high competition.
