(1) In this Subdivision, arrangement means:
(a) any agreement, arrangement, understanding, promise or undertaking, whether express or implied, and whether or not enforceable, or intended to be enforceable, by legal proceedings; and
(b) any scheme, plan, proposal, action, course of action or course of conduct, whether unilateral or otherwise.
(2) A reference in this Subdivision to the carrying out of an arrangement by a person shall be read as including a reference to the carrying out of an arrangement by a person together with another person or other persons.