Following a six-week feedback period, the USGA and R&A unveiled a new interpretation of the Rules of Golf and the use of green-reading materials on Monday.
The interpretation limits the size and scale of putting green books and any electronic or digital materials that a player may use to assist with green reading.
“We’re thankful for everyone’s willingness to provide feedback as we worked through the process of identifying a clear interpretation that protects the essential skill of reading a green, while still allowing for information that helps golfers enjoy the game,” said Thomas Pagel, the USGA’s senior managing director of governance.