NDIS says that a 65db loss in the better ear qualifies you for NDIS funding (as long as you meet other eligibility requirements), but remember, this only refers to the benchmark at which no further evidence is required.
If you are lower than 65db, you will need to provide further documentation to substantiate your application.
It does not mean you should be automatically rejected, although, in practice, they may do this at least on the initial application. They should always look at all your evidence and needs and not reject you purely based on dB levels.