4.2.1 All documentation for certification must
be completed and suitably stamped by the duly authorized Authority
as appropriate. This documentation shall also include all terms and
conditions, including replacement of spare parts, to ensure that the
engines maintain compliance with the required emission standards.
4.2.2 For an engine within an engine group, the
required documentation necessary for the engine parameter check method
is specified in 6.2.3.6.