According to the UTAS website, the BMedRes pathway as the only 'mature aged entry' pathway to MBBS rule doesn't come into effect until the 2019 cohort. It was originally 'advertised' as 2018, but then changed to 2019 a few days later.
(In other words, it was a shambles

)
The eligibility rules for non standard entry in 2018 are the same as this year, with the explicit caveat of 'reducing numbers' and a possible change in the way GPA is calculated (though they've never been clear on that in the past so it may not be any different).