I have finally found an official cite for the assertion. This is from the document Road/Rail Safety Interface Agreements: Rail safety guideline by Public Transport Safety Victoria, dated May 2009 - linky (PDF, 1.77MB, 91pp.)
4.4 New crossings
Planning scheme amendment 18.01-2 of the State Planning Framework states that “design of transport routes must provide for grade separation at railway crossings except with the approval of the Minister for Transport”. This policy is primarily intended to prevent the construction of new roadway level crossings.
Local councils have reported that there are, however, places where pedestrians frequently cross rail lines which are not registered pedestrian crossings. An example of this would be where there are formed pathways leading up to the rail tracks on both sides of the road, but only one of the pathways has a formed pedestrian crossing. While it is not practicable for road managers or rail infrastructure managers to manage all places where pedestrians may cross rail lines, they should consider instances where significant known safety risks exist (for instance, where train drivers frequently report near misses with pedestrians crossing tracks).