MV Agusta
I want all of those manufacturers in MotoGP a long with a half-dozen boutique companies as well. Some of the missing companies may be back in MotoGP sooner than you think. What's stopping MV from building a special variant of the new F4RR, and selling it to CRT teams?
The rules. Manufacturers can't field CRT teams or supply whole bikes to CRT teams. The only help a new manufacturer gets is 9 engines instead of 6. Now they could supply an engine to a CRT team. CRT teams can only be racing teams that build or buy a chassis and then buy an engine to go in it. The same as in Moto2 and Moto3 and therefore they should have just called them Moto1 teams.
Norton please
If manufacturers weren't allowed to supply bikes to CRT teams, Suter wouldn't be allowed to sell the Moto1. The rule is that any team can have its CRT status revoked by a GPC vote, and no manufacturer-branded team is allowed to compete as a CRT. It doesn't matter if MV sell the bike to teams instead of Suter.
If a manufacturer can sell a complete bike to a race team and have it run as a CRT then in theory Gresini, Tech 3, Pramac can all run as CRT's.
Suter as far as I know is building a chassis and then putting a BMW engine in it. There is nothing stopping them selling their chassis to someone else who also buys a BMW engine and running as a CRT.
If the manufacturers sold their MotoGP bikes on the open market, Gresini, Tech 3, and Pramac would be CRT teams. Even if they ran satellite equipment via lease they could be a CRT (technically), but before the first race was run, the GPC would reclassify them as "factory".
Anything sold on the open market is fair game, as long as the bike is not homologated for WSBK.
I am not sure you are correct but I totally respect your knowledge so I will ask for someone with more knowledge than me to give us some decisive answers. Krop?