Also it is slightly difficult for team B to commit a 5- or 10-yarder during the fumble return by team A. Team B players are allowed to grab opponets or push them in the back when they are attempting to reach the runner, so most "holdings" and "blocks in the back" are not fouls. I'm hard pressed to think of a pull-and-shoot situation during a fumble return. Is there a video of a foul that would qualify for this?
Now that I think of it, is there a foul that a team B could commit during the return by team A that would result in a five yard penalty? Is the language just a holdover from back when NCAA used to have the 5-yard face mask?
Kalle, the minor penalties don't have to occur during A's return - the foul only needs to be live ball. The apparent touchdown forces the penalty to be declined by rule. Because of that, the illegal touching (ITK) privilege for Team B remains available to Team B, which they, obviously, will accept, to cancel the TD. Since the TD is canceled, now Team A can have the 'minor' penalties enforced.
There are a few Illegal Substitution fouls that could happen any time during the down, with 5-yard penalties, that would fit this discussion. And technically, there is the "3-on-1 defensive linemen on an apparent field goal attempt all contacting an A lineman" foul, as well (although the world might be coming to an end if this ever actually happened). Those are all previous spot enforcement. Without the ITK, the Team B penalty would be declined by rule. But, the ITK "restores" Team A's ability to have those fouls penalized. Team A won't get the TD, but the five-yard penalty fouls will give Team A the ball back at the previous spot to repeat the down, or have a first down, if the yardage is enough.
The only 5-yard Basic Spot/3 & 1 penalty that I know about, could actually happen during B's advance: "assisting the runner." That would give the ball to Team B where the penalty leaves it, 1/10.
Team B fouls with 10-yard penalties (any time during the down) will be enforced per 3 & 1, giving the ball to Team B where the penalty leaves it, 1/10.