Definitions and guidance for forming WGs and SCs are described in this document, which has been approved by the EC. https://docs.google.com/document/d/1JTE9xHH2rBAuBN7r844YaY-5Kyg5BTvZ/edit
https://docs.google.com/spreadsheets/d/1YNmDi3PwS-IJtGzIkYGfSuthdUyRw_jBUHRm3pNFigY/edit?usp=sharing