Section 58 of the Principal Act is amended as follows:

(a) by omitting from subsection (1) "Authority" twice occurring and substituting "Office" ;

(b) by omitting from subsection (2) "Authority" and substituting "Office" ;

(c) by omitting from subsection (3) "Authority" twice occurring and substituting "Office" ;

(d) by omitting from subsection (4) "Authority" and substituting "Office" ;

(e) by omitting from subsection (4) "chief executive officer" and substituting "Executive Officer" .