Article 7 Agreements between authorities

The operation of articles 8, 10(2), 12(1), 13, 14, 16(2), 17, 19(1), 20 and 21 below is subject to any agreement to the contrary entered into in writing by two or more councils, but any such agreement in respect of a matter relating to a disaggregating authority shall require to be entered into by all the successor authorities of that authority.