Point 14 of the Waze Map Editor table of contents relates to Copyright.
Waze takes the issue of copyright very seriously and will and have delete a countries map data, if it is found to contain information that is not properly licensed.
The Wiki contains information created by the editing community editors who are extremely knowledgeable and experienced, some with direct access to Waze staff, and have spent hours discussing and creating the guidelines we all use to edit the map.
I will take this opportunity to remind you to have another look at the Waze Map Editor and Editing Manual Wiki pages, which both contain or link to information pertaining to Copyright.
A reminder to all editors that when using authorised external sources, check that the road actually exists before you map it. The direct porting of external map data into navigation systems is the mistake that other devices/companies make and is a large reason some people use Waze. We don’t want to be routing people through locked gates on dodgy national park tracks!