At the regional last year we presented a skin-health form for an old infection. We had procured the doctor's OK a month previously. The official at the weigh-in told me the form was "out of date." Does a skin-health form which indicates a return-to-competition date expire? Do we need to return to the doctor each week for a new form to confirm that the old infection is still non-communicable, or does one date then cover the entire future (assuming no further infections)?