The interior finish shall comply with the following:
- During the 40 kW exposure, flames shall not spread to the ceiling.
- The flame shall not spread to the outer extremities of the samples on the 8-foot by 12-foot (203 by 305 mm) walls.
- Flashover, as defined in NFPA 265, shall not occur.
- The total smoke released throughout the test shall not exceed 1,000 m2.