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The PGA Tour is set to implement a new club-testing program, in conjunction with the USGA, that will identify player drivers that are non-conforming or on the verge of becoming non-conforming.
In a memo sent to players Wednesday, the Tour specified that it will now test drivers pulled from directly from player's bags, as opposed to clubheads pulled from on-site equipment trailers.
Per the Tour, the new policy, is a response to originally conforming drivers that can, over time, creep their way beyond the Characteristic Time (CT) limit, which measures the spring-like effect of a clubface.