The rule is:

PART B – QUALIFYING FOLKSTYLE TOURNAMENTS

SEEDING MEETINGS - Each district will establish a deadline, 10 days prior to the sub-district tournament after which no additional entries may be made. At the seeding meeting, weight or age corrections or scratches may be made in all age groups, including walk-on wrestlers, prior to the start of seeding the wrestlers. Once the seeding starts, no changes, or additions will be allowed except in the case of clerical errors by the tournament director. (Emphasis Added)