New Zealand Cricket Players Association boss Heath Mills is adamant athletes will keep having to choose between club and country until the global calendar is aligned. 

Kane Williamson has joined a growing list in turning down a central contract to pursue the overseas T20 dollar but will still be available to a large extent for the Black Caps across all formats. 

Mills says each national board and T20 league design their own schedules independently, rather than collaborating. 

He told Mike Hosking that until they come together and agree on a programme that makes sense, then players are going to have to make these sort of decisions. 

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