This is on RG's site:
One of the conditions for a foul by Team B to be considered for PSK enforcement is that the foul occur during the kick (before it is caught or recovered). However, However, the foul must also occur 3 or more yards beyond the neutral zone to qualify for the enforcement (10-2-3). Fouls in the neutral zone or behind it do not qualify for PSK enforcement. (NOTE: Although fouling player was announced as #23, it was later determined the foul was actually on #32. In this clip, B32 is the defender who falls down on the hashmark @ the B-42)