[KWH]

Assuming it pass the vote of the NFHS...

PSK (or Postscrimmage Kick) Enforcement

Up until PSK is voted on an approved NFHS rules have always enforced loose ball fouls against TEAM B (or R) during a scrimmage kick from the previous spot. Well, with PSK, the enforcment spot "MAY" change to the spot where the kick ends. (BJ will beanbag the spot!) I said "MAY" because it doesn't automatically change rather it only changes if the following conditions are met:
The foul is against TEAM B (or R),
a) During scrimmage kick plays (other than a try or a field goal in an extra period).
b) During a scrimmage kick play in which the ball crosses the neutral zone.
c) The foul occurs three or more yards beyond the neutral zone
d) The foul occurs before the end of the kick, and
e) When team A does not have possession of the ball when the down ends

The logic hear is; "By kicking the ball away you are giving up possession!" Thus, unlike under todays rules where a defensive invalid fair catch signal during a loose ball would be enforced from the previous spot, (which may give A (or K) a first down), under PSK it would be enforced from the change of possession spot (the bean bag).
That is the general meaning of PSK.
Source: NCAA Rule 10-2e Exception 3a thru 3e Page FR-121

"Let me make one thing perfectly clear!" (didn't Richard Nixon say that?) This post was intended to be informative only!
Currently PSK is an NCAA and NFL rule only! It has not been voted on or approved by the NFHS. If it does pass it will most likely have differences (maybe suttle or maybe major) from what I have written.

We should know of any NFHS rule changes in a little less than a month when the NFHS rulemakers meet for their annual meeting...

My 2 cents