In this subdivision—
"internal review application" means an application for review under this
subdivision.
"internal review decision" see section 86C (1) .
"internal reviewer" , for an internal review application, means—
(a) if the application is for a decision of the commissioner under the Plumbing and Drainage Act 2018 , section 51 —the Service Trades Council; or
(b) if the application is for a reviewable decision not mentioned in paragraph (a) —the commission.