The schedule is planned from September 2019 to March 2020.
The rule is yet to be ratified though.
Williamson did not field in Bangladesh’s second innings in Wellington.
A team staff described the step to take Williamson for scans as a 'precautionary' measure.
Tamim Iqbal has a niggle in groin.
Mustafizur Rahman is most likely to return.
The right-hander scored a superlative ton in the second innings of the Hamilton Test.
New Zealand have already announced their playing XI.
Bangladesh are yet to win a Test against the Kiwis.
He bagged a golden duck in the first innings of the second Test.