The Committee on Administration shall superintend and have sole and complete control of all financial obligations and business affairs of the senate, the assignment of offices and seats, and the supervision of certain designated employees. The committee shall be authorized to employ an administrator, who shall be provided with office space as designated by the committee. The administrator or the secretary of the senate may be authorized to act for the committee, but only in the manner and to the extent as may have previously been authorized by the committee with such authorization entered in the minutes of the committee.