The Board will assert its jurisdiction in any proceeding arising under sections 8, 9, and 10 of the Act involving any private nonprofit college or university which has a gross annual revenue from all sources (excluding only contributions which, because of limitation by the grantor, are not available for use for operating expenses) of not less than $1 million. 29 C.F.R. §103.1 35 FR 18370, Dec. 3, 1970