The value of the stat dec is surely having his complaints backed up by other residents – i.e. THEY provide the stat dec to him to support his case.
For a straight forward complaint, I’ve never heard of having to provide stat decs to support your own complaint. Sounds like typical Fair Trading Call Centre Phone Jockey misinformation to me.
If I was in this position, I would find out who else is annoyed by this, then approach the EC and tell them that if you don’t see action being taken within, say, two weeks, you will start proceedings at the CTTT to have orders issued against the Owners Corp to enforce the by-laws.