Section 13
SEC. 13. The City Assessor and Collector shall furnish suitable rooms, desks, furniture, and stationery for the use of the Board of Tax Revision during its sessions, and shall also transfer for service under the secretary of the Board, without additional compensation, such number of clerks as the Board may need in the discharge of its duties under this Act. The secretary of the Board shall have free use of the mails for the public business of the Board and all letters upon official business shall be mailed under his frank.