New Zealand Cricket chief executive Scott Weenink is calling for dedicated windows for international and domestic cricket.

Black Cap Kane Williamson has turned down a central contract to pursue an overseas T20 league opportunity in January - but will still be available for most international fixtures.

Williamson follows Trent Boult in doing so, and with Lockie Ferguson to do the same, Weenink says it's vital to achieve a universal approach to the calendar.

"That's where I'd like to see us go. I think it's really important for the future of cricket that we get some windows agreed - which prioritise international cricket with domestic cricket playing around international cricket."

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