No it's not written anywhere, just up to the individual clubs on what they see as best practice. Loads of new shooters try to run and shoot IPSC fast because that's what they see everyone else doing, rather than having the skill to block out a stage, transitions, etc AND shoot straight.
Looks like the holster course at CPC is specific to the club, esp if they're including IPSC rules (which is a great idea), seeing they're including other activities and not just being holster qualified.
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