pike51 Rory was not allowed to replace the driver during the round.
It didn't brake in the course of normal play, but by abuse (Rory leaned on it).
Fitspatrick cracked his driver in normal play, but a crack is considered normal wear and tear. So If I buy a new driver and after a weeks play it cracks, the manufacturer does not have to replace it, it's normal wear and tear. Good to know.