Skillion roof to existing Separating Wall
Australian Standard 1684, Residential timber-framed construction, deals with the design of the roof itself (member sizes, tie-down to resist wind uplift, etc.) but not the connection of a new roof to existing brickwork. This would usually be done by fixing a ledger board to the brickwork, which in your case appears to be a solid wall, the thickness of two standard bricks. We are not aware of an Australian Standard that covers this, but there is some advice on the net.