The 'Supplementary Provisions (issued February 1988)" to give them their full title, are introduced in Chapter 4. They are placed after the main conditions of the JCT with contractor's design contract, having been introduced primarily to enable parts of the BPF system approach to be accommodated by the JCT contract. The BPF is a constituent member of the JCT. The provisions make no reference to the BPF system and they may be used as they stand without importing that system into a project.