The reason that you are getting mixed messages may be because it varies from issue to issue.
For instance, issuing a Notice To Comply, seeking interim orders or requesting the statutory appointment of a strata manager or the reallocation of unit entitlements don’t require mediation but most other things do.
Section 238 actions require mediation but that is often just a formality you have to observe before you can progress to the Tribunal. I wouldn’t expect anything from mediation – the other side might not even turn up – but you have to try.
The application form lists some of the issues that don’t require mediation … but yours does.