Complex sentence: It provided for Part 7 of the Terrorism Act 2000, which would otherwise have expired on 18 February 2006, to continue to be in force until 31 July 2007, subject to modifications.
Split into simpler sentences: It provided for Part 7 of the Terrorism Act 2000. The act, which would otherwise have expired on 18 February 2006, continued to be in force until 31 July 2007, subject to modifications.