The USGA rule 14-3 goes into effect in 2016.
For the basics, check this short video:
2 Parts to the rule:
1. Less Penalty (2 strokes compared to DQ – but watch video for full details)
2. This mainly applies to lasers – you can now turn ‘off’ the non-conforming part of the unit…i.e. slope, and it will NOW BE LEGAL. (watch video)
Next series of posts: increasing clubhead speed in 2016!