Text in force at CS25-28: from CS25-3, effective 19 Sep 2007.
(See AMC 25.994) Fuel system components in an engine nacelle or in the fuselage must be protected from damage which could result in spillage of enough fuel to constitute a fire hazard as a result of a wheels-up landing on a paved runway under each of the conditions prescribed in CS 25.721(b).
ED Decision 2007/010/R · Source