Section 147 of the Principal Act is amended as follows:(a) by omitting from subsection (1) "A Chief" and substituting "The Chief" ;(b) by omitting from subsection (6) "a Chief" and substituting "the Chief" ;(c) by omitting from subsection (7) "a Chief" and substituting "the Chief" ;(d) by inserting the following paragraph after paragraph (g) in the definition of prescribed matters in subsection (8) :(ga) whether the mental health service delivery principles, set out in Schedule 1 , have been considered when exercising a responsibility under this Act;