Until a permanent settlement was reached, the Irish membership at Westminster was to remain at its original number of 103.
The document embodying these conclusions was accepted in identical terms by each side, and each party of negotiators set out for Ireland to endeavour to secure acceptance of it.

But before he left London Sir Edward Carson asked for an interpretation of the terms.

Did the agreement mean that none of the six excluded counties could be brought under a Dublin Parliament without an Act of Parliament?
In other words, was the exclusion permanent until Parliament should otherwise determine?
He was answered that the Prime Minister accepted this interpretation, and would be prepared to say so when the matter came before Parliament.
Knowledge of these communications was not conveyed to Redmond.

Redmond's interpretation was that at the termination of the war this arrangement lapsed, and the Home Rule Act, which was the law of the land, came into force.

If Ulster, or any part of it, were to be excluded, it must be by a new amending Act.