TheTeach,
http://usawks.com/HighSchool/skinHS.pdfI understand your frustration. Attached is a link to the form you will need to have your son's pediatrician fill out. It is necessary to allow your son to participate in any USAWA sanction event or practice. I have not seen the birthmark; however your situation is not that uncommon. Procedures are in place for the common good. You would not want you son wrestling another wrestler with a contagious skin condition would you? Get the birthmark documented properly and I don't think you will have any more problems.
I hope this helps.
