If I might just answer in thirty seconds, I'm not very familiar either with the U.K. act, but my understanding is that it refers specifically to the Secretary of State for International Development spending, which means that other spending, such as contributions to multilateral organizations, once again, I would expect to fall under the portfolio of the Minister of Foreign Affairs. It would thus not be covered by that specific piece of legislation.
On November 28th, 2006. See this statement in context.