Subject to section 281 , this part applies to the following action—
(a) action taken by an employer;
(b) action that affects, is capable of affecting or is taken with intent to affect the activities, relationships or business of an employer;
(c) action that consists of advising, encouraging or inciting, or action taken with intent to coerce, an employer—(i) to take, or not take, particular action in relation to another person; or(ii) to threaten to take, or not take, particular action in relation to another person.