Touch piece in opponent's time

I'm after a rule clarification in over the board chess.

My understanding was that once you pressed your clock you were not allowed to touch any pieces (i.e. to adjust).  If you did then the opponent could claim a win.  There is a video somewhere on YouTube of an incident in (I think) a big tournament in India where a player knocked a piece over in the process of moving his hand to the clock.  He pressed the clock then stood the piece back up.  His opponent claimed a win and it was given as a win by the arbiter.  In a discussion today with a fellow organiser I was told today that this rule is no longer the case and instead it is a time penalty (no matter how often they do it).  I wasn't aware of any change.  Is there anyone who can clarify this point and preferably point to where in the FIDE rules it is covered?

First, you need to find documentation for your story. That seems totally unbelievable to me, unless it was a blitz game and even then it seems unnecessarily harsh.

Unless somebody deliberately knocks pieces from the board, there would never be a win awarded.

This wasn't the video I was thinking of but it has the same scenario:

https://www.youtube.com/watch?v=uKOZJ5B2rbo  I can't immediately find the video I was referring to but remember the discussion afterwards and apparently the decision was correct.  It wasn't the knocking over of the piece that was the issue but the fact that he stood it up after pressing his own clock (i.e. in the opponent's time) that was the issue.  I agree it is harsh but there are various quirky rules that seem a bit harsh.  I was just wondering if anyone was aware of anything in the FIDE rules that gives a clear ruling one way or the other.

Article 6.2.5 Only the player whose clock is running is allowed to adjust the pieces.

When you touched the piece when it was not your move, it was considered illegal. Thus, the indian GM lost his game. But the new FIDE rule states that if an illegal move is played, extra time is given to the opponent. (Check updated FIDE laws of chess)

The opponent could claim an infraction of the rules.