"The combination of the Tsingshan and Nickel West contracts will result in Western Areas realising a greater return from nickel produced in concentrate, versus the incumbent contractsthat are due to expire on 31 January 2017. This impact will begin to be recorded partially for FY17 and fully for FY18 onwards. "
They've always been coy about exact offtake terms but this can only be positive (although greater could mean anything down to 0.1% better)