My best guess is the problem they are trying to correct is Dan Kirby making a mountain out of a mole hill but I'm sure the party lline would have something to do with liabiliy issues. There are some things in the rule book reserved for the UiC that LL apparently feels shouln't be left to the decision of "children." Following is something I found online that perhaps might explain they're reasoning or at least give some insight as to the true unerlying reasons.
FYI,
I have just received the following statement from Steve Barr, Little League Director of Media Relations.
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Little League International Statement: Children as Managers, Coaches and Umpires
Some leagues that have requested to use child umpires, managers or coaches, in order to develop them as
volunteers, and to augment the volunteer base at the local league.
It has always been the policy of Little League that managers, coaches and umpires should be adults, because it
is unwise to put children in charge of other children in a competitive activity such as baseball and softball.
The reasons for that policy should be obvious to anyone.
A person designated as a manager, coach or umpire is, in fact, acting as a parent of sorts on a baseball or
softball field. In that capacity, the manager, coach or umpire has certain leadership as well as legal
responsibilities for the safety and well-being of the children in his/her care.
Placing a child in charge of other children in that capacity, without the benefit of an adult present and in
the same capacity, is grossly unfair to the child, and to the children and adults they are supervising. Also,
it places the adults – who would allow such a situation to occur – in a potentially dangerous position legally.
With respect to allowing only children to umpire a game, it means they are responsible, by rule, for
maintaining the discipline of the adult managers and coaches. Regardless of a league’s opinion of its current
adult managers and coaches, anyone can see that such a situation also is grossly unfair to the child umpires
in such a game.
Little League International has developed new rules allowing child coaches (age 16 or 17 only), provided an
adult manager is present at the game or other activity, and provided another adult coach is on the roster.
We also have developed new rules for 2010 that provide for a child umpire (of any age), but only if an adult
umpire is present on the field for that game, in the capacity of umpire-in-chief.
These changes in the rules still permit the development of children as volunteers, but require adult support
for the obvious reasons noted above.
Also, while the umpire-in-chief is usually the home plate umpire, we are allowing the designated
umpire-in-chief to be a base umpire, if the league wishes to do so. That would allow a child to be the plate
umpire in a game, provided an adult who is a base umpire is designated as the umpire-in-chief for that game.
These new rules allow children to gain the experience of being a volunteer coach or umpire, while not putting
those children or the children in their care, in legal danger.
END
This really is moot at this point and something everyone will just have to figure out how to deal with.