6.2 How to create a joint Working Group
Although not required, it is recommended to create a Companion Specification in cooperation with the OPC Foundation.
How to create such a Working Group is described here:
https://opcfoundation.org/joint-working-groups/
This web page contains links to
A template for a charter of a working group
A template for a MOCA (multi organizations cooperation agreement)
A list of existing joint working groups