(1) Except in designated areas, smoking of any tobacco product, including but not limited to, cigarettes, cigars, and pipes, shall be prohibited in all National Government-owned offices, and in all offices that are being rented or leased by the National Government for a period exceeding 30 consecutive days. Where only part of a building or facility is rented or leased by the National Government, this prohibition shall only apply to the part of the building or facility that is rented or leased by the National Government for use as an office.
(2) Within every office in which smoking is prohibited under subsection (1) of this section, signs shall be posted in sufficient number and in such locations as to be readily seen by persons within such areas, which shall clearly designate that the smoking of any tobacco product is prohibited.