On the date on which a joint board established under this section begins to exercise its functions—
(a) the library officers of the authorities constituting the board shall by the operation of this provision be transferred to and become officers of the joint board; and
(b) the library assets and liabilities of those authorities shall, save as may be otherwise provided by the order setting up the board, be transferred by the operation of this provision to the board.
The Secretary of State may on the application of an authority comprised in a joint board established under this section by order provide for the dissolution of the board, and on its dissolution the authorities constituting the board shall again become library authorities:
On the dissolution of a joint board established under this section—
(a) each library officer of the board shall by the operation of this provision—
(i) where at the formation of the board he was a library officer of one of the authorities which on the dissolution of the board again become library authorities, be transferred to and again become an officer of that authority;
(ii) in any other case be transferred to and become an officer of such authority (being one of the authorities which on the dissolution of the board again become library authorities) as may be agreed between those authorities or, in default of agreement, determined by the Secretary of State;
(b) the library assets and liabilities of the board shall be divided among the said authorities as provided by the order dissolving the board.