(2) The following items of income shall be retained by each such State College or University or by the Board of Governors of State Colleges and Universities in its own treasury: endowment funds, gifts, trust funds, and Federal aid; funds received in connection with contracts with governmental, public or private agencies or persons, for research or services including funds which are paid as reimbursement to the State College or University or to the Board of Governors of State Colleges and Universities and funds received in connection with its operation of research and high technology parks; funds received in connection with reserves authorized by Section 8a of "An Act to provide for the management, operation, control and maintenance of the State Colleges and Universities System", approved July 2, 1951, as amended; funds received in connection with the retention, receipt, assignment, license, sale or transfer of interests in, rights to, or income from discoveries, inventions, patents, or copyrightable works; funds retained by the State College or University under the authority of Section 6a-2, and funds received from the operation of student or staff residence facilities, student and staff medical and health programs, Union buildings, bookstores, farms, stores, and other auxiliary enterprises or activities which are self-supporting in whole or in part. Any income derived from such auxiliary enterprises or activities which is not necessary to their support, maintenance, or development shall not, however, be applied to any general operational or educational purpose but shall be paid into the State Treasury as provided in paragraph (1) of this Section. Whenever such funds retained by each such State College or University or by the Board of Governors of State Colleges and Universities in its own treasury are deposited with a bank or savings and loan association and the amount of the deposit exceeds the amount of federal deposit insurance coverage, a bond or pledged securities shall be obtained. Only the types of securities which the State Treasurer may, in his discretion, accept for amounts not insured by the Federal Deposit Insurance Corporation or the Federal Savings and Loan Insurance Corporation under Section 11 of "An Act in relation to State moneys", approved June 28, 1919, as amended, may be accepted as pledged securities. The market value of the bond or pledged securities shall at all times be equal to or greater than the uninsured portion of the deposit.