Originally Posted by turtleback
I can understand how the local rule would be in effect or not in a competition. But how would that play out in one of those supplemental rounds? Would it be a local rule adopted by the course, the handicap committee of the club through which the handicap is established? Wouldn't there be the possibility of distortion if one club's HC allows it and another doesn't?
Disclaimer: I don't know much about your system, just to provide context in case I say something stupid.
In the UK it is normal for LRs to be applied for the course by the Members' Competition/Handicapping Committee and therefore for all rounds played by Members.
Although about 50% of courses here are proprietary clubs (ie owned by hotels or other companies) but they will have a Members club running the golf. Some owners will be very hands on but usually work closely with the members committee.
To have a handicap the Members' Club has to be affiliated and pay a subscription to the national authority (eg Golf England or the Scottish Union).
Visiting parties may well choose which LRs to ignore or add, but that is very unusual.
Of course, some (many) members playing socially do whatever