On September 22, the USGA and R&A sent a notice to equipment manufacturers. Not a press release. A request for comment on three proposed Model Local Rules — technical changes to the way drivers and balls are tested — that could take effect as early as January 2028. Manufacturers have until October 21 to respond.
The three proposals are narrow. A conforming golf ball must produce an overall distance of 317.0 yards or less when tested. The current test allows a three-yard tolerance — a ball that flies 320 yards in the lab has been conforming this whole time. The tolerance is gone. A driver head must have a Characteristic Time of 239 microseconds or less, eliminating the eighteen-microsecond buffer that let a face measuring 257 pass. The maximum club length may be shortened beyond the current 46-inch Model Local Rule.
None of this changes the rules of golf. These are Model Local Rules — opt-in provisions that tours can adopt at their discretion. They would not make your Pro V1 non-conforming or your driver illegal. The global rollback that applies to every golfer has been pushed to 2030.
What the proposals create is a split. For the first time in the game's history, the equipment rules governing a PGA Tour event would differ from the rules governing a Saturday fourball. The industry calls it bifurcation, and it has been debated for two decades. Acushnet, Titleist's parent company, has called it something that would "divide golf between elite and recreational play, add confusion, and break the linkage that is part of the game's enduring fabric".
What changed is the timeline. The universal rollback was supposed to arrive in 2028. The USGA and R&A pushed it to 2030 after industry pushback. These three Model Local Rules are the stopgap — a way to dial back tour distance without waiting for the universal rule. Geoff Shackelford, writing in The Quadrilateral, described the proposals as "a more extreme version of equipment bifurcation for 2028 instead of 2030."
The tolerances matter more than the numbers suggest. A three-yard window on ball distance and an eighteen-microsecond buffer on driver CT are not safety margins. They are the space in which manufacturers compete. The R&D that produces a ball flying 319.8 yards instead of 317.1 — without failing the test — is the work the governing bodies want to curtail. Closing the window does not move the limit. It makes the limit real.
The number was never 317. It was 320 — because the test came with a three-yard tolerance that every manufacturer used. The same applied to driver faces: the published ceiling was 239 microseconds, but the working ceiling was 257. The distance the proposals remove is not theoretical. It is the distance between the rule as written and the rule as exploited.
For tour players, the USGA estimates roughly 15 yards lost off the tee at the highest swing speeds. For the average amateur, the number would be 3 to 5 yards — but only when the global rollback arrives in 2030. The tour-only proposals do not touch the ball in your bag.
That is what makes this new territory. Until now, the numbers on television described what the same equipment could do in faster hands. A tour player hitting a Pro V1 at 120 miles per hour was hitting the same ball you hit at 95. The distance gap was physiology. Under bifurcation, the tour ball will fly shorter than the retail ball at the same swing speed. The tour driver face will be less hot. "Tour average" stops being shorthand for what the best do with the same gear.