Can a Shotgun Start be a Qualifying Competition?

Having a Christmas Competition this week and they are having a shotgun start to get everyone in together. Comp is individual stableford off full handicap.

Some debate as to whether it should be qualifying.

Pros say it's no different to a 2 tee start and everyone plays same 18 holes.

Anti say there isn't a stipulated course as every group plays a different course.

Is there a definitive answer anywhere please?