In this Part:
"business" includes:
(a) a profession or trade; and
(b) any other activity carried on for fee, gain or reward; and
(c) the activity of employing 1 or more persons who perform duties for or in connection with another business; and
(d) the carrying on of a trust (including a dormant trust); and
(e) the activity of holding any money or property used for or in connection with another business;
whether carried on by 1 person or 2 or more persons together.
"group" means a group constituted under this Part, but does not include any member of the group in respect of whom a determination under Division 4 is in force.