POE - FT Shooter Contact

[RefsNCoaches]

Have my first contest of the year tonight...Would like input on this from you guys on this.

NFHS Reads:
Players who occupy free throw lane line marked spaces during
free throws may enter the free-throw lane upon the free thrower releasing
the ball; however, should a defensive player cross the free-throw line too
soon, it is a violation. A delayed violation signal is to be displayed. If the
free throw is successful, the violation is ignored.
If a defender contacts the free thrower, a personal foul is the correct
ruling. If the free throw is unsuccessful, the violation is enforced and a
substitute free throw is awarded. If a defender contacts the free thrower, a
personal foul is the correct ruling. Whether the free throw is or is not successful, the penalty for the personal foul is awarded. If the free thrower’s
team is in a bonus situation, the free thrower would be awarded a one-and one or two free throws. If the free thrower’s team is not in a bonus situation,
his or her team would be awarded a throw-in along the end line.

So is any contact on a FT shooter by defense, while ball is in flight is to be called a PF... Is it that black and white for us officials?