(1) This Part does not apply to a dispute relating to -

(a) any matter arising out of section 6(5) and 6(6),

(b) any matter arising out of paragraphs (a), (c) and (d) of section 6(1), and

(c) any matter arising out of section 18.

(2) Where, in a dispute, there is a decision of a deciding officer or an appeals officer that concerns a matter specified in paragraph (a), (b) or (c) of subsection (1), an adjudication officer within the meaning of the Workplace Relations Act 2015 or the Labour Court, as may be appropriate, shall accept that decision as a final determination of that matter.

(3) A document purporting to be a decision of a deciding officer or an appeals officer and signed by that officer shall be sufficient evidence of the making of the decision and of its terms, without proof of the signature of that officer or of the official capacity of that officer.

(4) This Part does not apply to a member of the Defence Forces.