(1) Designated work groups may be established of—
(a) employees of an employer at one or more workplaces; and
(b) employees of one or more other employers at one or more workplaces.
(2) The particulars of the designated work groups are to be determined by negotiation, in accordance with section 48, between each of the employers and the employees.
(3) The establishment of one or more designated work groups under this Division does not—
(a) prevent the establishment under this Division or Division 1 of any other designated work group of the employees concerned; or
(b) affect any designated work groups of those employees that have already been established under this Division or Division 1.