Such board of regents shall be required to make such charges, including the imposition of student fees as above provided, for the use or availability of said building, improvement or facility purchased or erected hereunder and the furnishing of the services for which same is purchased or erected and used as will return annually a sufficient amount to pay the annual requirements for repayment of principal and interest on such bonds or other evidence or [of] indebtedness; and in addition thereto may make additional charges, including the imposition of student fees as above provided, for the use or availability of said building, improvement or facility and services to return a sufficient amount to pay all necessary costs and expenses of maintenance, upkeep and any required repairs thereto and all necessary costs and expenses of furnishing all services in connection therewith, and sufficient to create such reserves for the payment of principal and interest and for contingencies as may be provided in the proceedings authorizing such obligations; but said board of regents shall make no further or

additional charges for the use or availability of said building, improvement or facility and the furnishing of the services for which the same is erected or purchased and used, to the members of the student body, faculty, instructors and other employees of such institution.