14.3.1 Thermal or acoustic insulation fitted inside
the engine space should be of non-combustible material when tested
in accordance with Annex 10.
14.3.2 Insulation should be protected against
impregnation by flammable vapours and liquids. Where insulation is
cut, the edges should be protected against such impregnation, e.g.
by the use of non-combustible tape. Where the insulation is vulnerable
to damage it should be protected.