20. —(1) A fire authority may make an arrangement pursuant to section 86 of the Act of 2001 with another fire authority for the joint discharge of any of their functions under Part 1 or 2 and such arrangement may relate to all or any part of the functional area of the fire authority.

(2) A fire authority may, in respect of its functions under Part 1 or 2 and by agreement, provide services for or avail of the services of any person other than a fire authority.