For "No Smoking" placards the regulation states there must be at least one placard legible to each person seated in the cabin. If smoking is allowed, it is required that there is a sign notifying each of the passengers when smoking is not permitted. The "No Smoking" placard must be operable by a member of the flight crew. This sign must be legible under all different lighting conditions of the cabin, which is why it is typically a lighted sign.
Placards denoting when seat belts must be fastened should be visible to all persons seated in the cabin. These must also be visible under all lighting conditions. The ability to turn the seat belt sign on should be within reach of at least one member of the flight crew. In addition, this sign should be able to be operated from either pilot's seat.
Each of the lavatories in a plane must have a "No Smoking" or "No Smoking in Lavatory" placard. These signs should be positioned adjacent to every ashtray in the lavatory. The lettering on the placards should be red and 0.5 inches tall. The background should be white and be at least 1 inch tall.
Every plane is required to have a trash receptacle used for flammable waste materials. These bins are not for the disposal of cigarettes and should be clearly marked as such. A placard must be located on or adjacent to the door identifying the receptacle's purpose as well as the inability to dispose of cigarettes in the bin.
