Nope - that's long gone.
Once your contract is based na 7 day roster there is no premium.
I may be wrong, but I think it was done away with in 1996.
If however your contract stipulates Monday to friday or Monday to saturday, THEN a sunday premium is payable. But it would be highly unlikely that this is in a modern contract.
Its there in section 2 of the workplace document you bave above
Section 14 of the Organisation of Working Time Act 1997 sets out statutory rights for employees in respect of Sunday working. Any employee who is required to work on a Sunday and, his or her having to work on that day has not been taken account of in the determination of pay
Basically, if your contract says Sunday is a normal rostered day, then that is what it is and no premium applies.