Official Q&A: VRC 2020-2021: Change Up

Rule R6 reads as follows:

<R6> Robots are built from the VEX V5 or Cortex system. Robots may be built ONLY using official VEX V5 and Cortex components, unless otherwise specifically noted within these rules. Teams are responsible for providing documentation proving a part’s legality in the event of a question. Examples of documentation include receipts, part numbers, official VEX websites, or other printed documentation.

Parts from a VEXplorer kit which are identical to a V5 or Cortex part, such as metal structure or shafts, are legal. However, parts which are not found in the V5 or Cortex ecosystems would not be legal. This would include any electronics, custom wheels, plastic connectors, or non-standard gears.