(1)  If a person is a member of 2 or more groups, the members of all the groups together constitute a group.

Note: Section 79 (Exclusion of persons from groups) allows the Commissioner, for payroll tax purposes, to exclude persons from a group constituted under this section in certain circumstances.

(2)  If 2 or more members of a group have together a controlling interest in a business (within the meaning of section 72 ), all the members of the group and the person or persons who carry on the business together constitute a group.