Access to Emergency Exits and Equipment

No person shall operate an aircraft with carry-on baggage, equipment or cargo on board unless:

The safety equipment, the normal and emergency exits and the aisles between the flight deck and a passenger compartment are not blocked by carry-on baggage, equipment or cargo
All of the equipment and cargo that are stowed in a passenger compartment are packaged or covered to avoid possible injury to persons on board
All of the cargo that is stowed in a compartment to which crew members have access is stowed in such a manner as to allow a crew member to effectively reach all parts of the compartment with a hand-held fire extinguisher

If an aircraft is certified to carry ten or more passengers, the following also apply:

No passenger’s view of any “seat belt” sign, “no smoking” sign or exit sign may be obscured by carry-on baggage, equipment or cargo
All of the passenger service carts and trolleys are securely restrained during movement of the aircraft on the surface, takeoff and landing, and during in-flight turbulence
All of the video monitors that are suspended from the ceiling of the aircraft and extend into an aisle are stowed and securely restrained during takeoff and landing