[Tagging] left: & right:

[Dave F.]

Hi

Are the left: & right: tags which are commonly used to determine admin 
boundaries ways still relevant when the boundary is also in a relation?

eg http://www.openstreetmap.org/browse/way/198923188

Also should the admin_level be tagged in the way as it could be a shared 
boundary of differing levels.

I think the answer is 'no' to both my questions but I want to get a 
consensus before removing.

Cheers
Dave F.