This Chapter has effect subject to the following modifications in the case of an amalgamation or transfer of engagements to which a trade union and a Northern Ireland union are party.

The requirements of sections 98 to 100 (approval of instrument; notice to members; passing of resolution) do not apply in relation to the Northern Ireland union; but the Certification Officer shall not register the instrument under section 101 unless he is satisfied that it will be effective under the law of Northern Ireland.

The instrument of amalgamation or transfer submitted to the Certification Officer for his approval under section 98 shall state which of the bodies concerned is a Northern Ireland union and, in the case of an amalgamation, whether the amalgamated body is to be a Northern Ireland union; and the Certification Officer shall withhold his approval if the instrument does not contain that information.

Nothing in section 102 (alteration of rules) or section 103 (complaint as to passing of resolution) applies in relation to the Northern Ireland union.

Subject to the exceptions specified above, the provisions of this Chapter as to amalgamations or transfers of engagements apply in relation to the Northern Ireland union.