Sunny, civilised society does not work like that. There is only one valid reason to withdraw emergency services, and that is when their personnel are themselves endangered.
From reading Tyabb Airport's claim to 24 hour operations, it seems that there was tacit acceptance that the church hour would not be enforced. The advice merely discourages flying at anti-social hours but does not prohibit it....yet.
When VCAT hear this matter it would not be surprising if they removed the church hour limit from the books but made way for other parties to seek more restrictive hours of operation.
Stirring the possum usually has consequences.