In the opinion of the Chair, the subamendment does fall within the amendment that was proposed. It simply clarifies the amendment. If the clarification is such that the House finds it objectionable, the House can reject it when voting on the subamendment. However, I think the subamendment appears to be in order and I have accordingly put it to the House.
In the House of Commons on April 14th, 1999. See this statement in context.