The more I look into it, the more I think you are probably correct.  I have already eliminated a lot of the Catalog UI Policies and Catalog Client Scripts, and it has made no difference.  The ones that I have left, none of them make any changes to the field's value or properties.

So, I should be looking for Client Scripts, specifically "OnLoad" ones on the Requested Item table, right?  Should I also be checking the parent table (Task)?  Or any other Business Rules or anything like that?  Is there anything specific to the Variables section of RITMs?

I am just trying to determine all the places I should look, other than OnLoad Client Scripts on the Requested Items table.

Thanks