Reply to Question about midi, global channels and and midi controls

How many unique midi controls can you have on one global channel at a time?

Example being, you have one midi controller with 20 various buttons and knobs, cc1-20, on global channel 1, and you have the exact same controller and leave it on global channel 1 but make those 20 various buttons and knobs cc21-40 so they won't interfere with each other now.

Is there a finite number of controls one can have on global channel 1 before they move onto global channel 2?