The board of regents of said municipal university shall have power to prescribe rules, regulations, compensation and charges, if any, for the use; and to prescribe the purpose and manner of use, by persons, associations and corporations of the lands or buildings of said university or any part thereof at such times as the same are not required for the use of said university and those attending thereat. Such moneys received by the university shall be credited to the general fund of the university. Said board shall have power to prescribe the fees or charges, if any, such persons, associations or corporations may exact for attendance at or participation in the use so permitted.