Any individual who derives 90% or more of his total wages received from all sources, athletic or non-athletic, during his base period from participating or training or preparing to participate in sports or athletic events shall be ineligible to receive benefits, based upon his total base period wages or any portion thereof, for any week commencing during the period between the two successive sport seasons or similar periods if:
Ill. Admin. Code tit. 56, § 2910.1