This serves to confirm that 2019 Finale participation does count as an event towards the registration tiers for the 2021 Finale.
Also, 2021 ProSolo rules have been reposted on the main site at https://www.scca.com/pages/solo-cars-and-rules. As announced earlier in the season, Pros in 2021 will be following the 2020 Pro rules, but those rules are based on the CURRENT National Solo rules when it comes to which cars are in which Solo classes and the related preparation allowances.
The addendum that is posted contains the changes resulting from the 2020 to 2021 Solo rule changes. A single document containing the rules and updates should be uploaded next week.
Howard's notes regarding the continuation of the 2020 ruleset can be found in his earlier National Solo Notes here.