there must be a complaints procedure for issues with Named Persons abusing their powers
You would think so but not so much. There is provision in the act for the Government to define a complaints procedure by order of a minister but not one that needs to be voted on. The following is the list of things about complaints that aren't in the legislation but which can be decided on by ministers later and changed once decided without all that tedious debate and voting stuff
(a)matters which may, or may not, be the subject of a complaint,
(b)who may make a complaint,
(c)how a complaint may be made,
(d)time limits for making complaints,
(e)steps which require to be taken before a complaint may be made,
(f)who is to consider a complaint,
(g)the procedure for the consideration of a complaint,
(h)the obtaining of information for the purpose of considering a complaint,
(i)the keeping of records in relation to complaints or their consideration,
(j)the making of findings, and reporting, following the consideration of a complaint.
Its pretty comprehensive and is the sort of thing that should be decided first and enacted in the legislation.