(1) This Division applies only to a claim for damages against a worker's employer in respect of an injury that was caused by--(a) the negligence or other tort (including breach of statutory duty) of the worker's employer, or(b) a breach of contract by the worker's employer.
(2) Subsection (1) (a) applies even if damages resulting from the negligence or other tort are claimed in an action for breach of contract or other action.
(3) A reference in this Division to a worker's employer includes a reference to--(a) a person who is vicariously liable for the acts of the employer, and(b) a person for whose acts the employer is vicariously liable.