Does the Rule About "Oscillating" Still Apply?

[RandyBobbitt]

Couldn't find an answer to this question in the 2019 rule book. It's always been my understanding that if you address the ball and it "oscillates," there's no penalty as long as the ball returns to its original position. But is there a difference in the ruling if the clubhead actually makes contact with the ball as opposed to just causing it to move by addressing it? 

Here's a situation that never happened to me in 40+ years of playing golf but has now happened twice in the last week. I'm addressing the ball on the putting green, and due to carelessness I accidentally touch the ball with the putterhead. The ball moves about one-eighth of an inch but then rolls back to the original position. Penalty or not? 

[Rulesman]

No change. See the definition of 'Moved'.

[iacas]

To (barely) elaborate, too, @RandyBobbitt, this rule was unchanged from 2018 if the Local Rule re: the putting green was in place. Balls have been able to "oscillate" for years and years now, and balls on the putting green accidentally moved (not just oscillated) have been no penalty for a few as well with the LR in place.