Funny thing, hard to get any info on this contract , even from people in positions that should know.
So , I can only conclude that they intend to get say 800+ hrs for 75% basic pay over the 9 months work.
And by the way part time contractors does anything from 650 to 800hrs, so , they can, and most likely will roster you minimum 100hrs per month if employed like this.
Skeptical until proven wrong , in this case.