Hi
from the R&A site.
appendix 1, part C, 1a. if the committee wishes to limit players to drivers that have a clubhead identified by model and loft, and is on the Conforming Drivers Head list, the list should be made available and the following conditions of competition used:

Any driver the player carries must have a clubhead, identified by model and loft, that is named on the current list of Conforming Driver Heads issued by the R&A.

Exception: A driver with a clubhead that was manufactured prior to 1999 is exempt from this condidion.


hope that helps some of you with older drivers.
cheers
bill

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