14 C.F.R. § 121.295
After November 28, 2009, all airplanes with a maximum certificated passenger seating capacity of more than 60 persons must have a location where a suspected explosive or incendiary device found in flight can be placed to minimize the risk to the airplane.
[Docket FAA-2006-26722, 73 FR 63880, Oct. 28, 2008]