The rules simply state that the "non-pivot" foot must be IN CONTACT with (or behind for HS) the plate. I don't see anything about the contact point must be ON TOP of the plate.
Now that MOM has clarified which foot she meant...
For high school, the rules do state that the
pivot foot must contact the
top surface of the plate. Other rule sets- for instance, ASA- don't have that requirement. They allow the feet to contact
any portion of the plate- could be butted up against the vertical sides or on the top.
But, since MOM was asking about the
stride foot, the above requirement is moot. You are right, Sammy- high school rules do not require the stride/non-pivot foot to contact with any specific portion of the plate.
In fact, they don't require it to be touching the plate at all! So what the umpire told MOM's kid was absolutely false.
He was just as wrong about needing to touch the top of first base to tag it. All the bases are treated as three-dimensional objects and touching the side of a base is just as valid as touching the top. This even applies to home plate, where touching the black beveled edge is interpreted as touching the side of the plate.
I have found that the
pickier umpires, who need to interject themselves with unessessary warnings or are quick to flaunt their "knowledge" of arcane technical aspects of questionable rule violations, are usually covering up for a lack of their understanding of the rules. This umpire seems to have blown it on at least two such points. Kind of makes you wonder what other basic rules he doesn't have a good grasp on.