No maximum/minimum. Although the course coordinator can do whatever the hell they want to the final marks (scale them up/down as appropriately to bring them in line so they are similar to previous years if this year had an easy/hard exam etc).
Of the 20 most marginal Labor seats in the country, only 5 of those MPs threw their support behind Rudd. The other 15 chose 'death over honour' and refused to back Rudd.