Excise exemption for electric motors and parts used in pump-set manufacture allowed, conditional on in-use purpose and Chapter X procedures. Exemption applies to electric motors (8501.00) and parts of electric motors (8503.00) when used in the manufacture of submersible pump-sets or mono-bloc pump-sets; where such use occurs outside the factory of production, the procedure in Chapter X of the Central Excise Rules, 1944 must be followed.