Dec 18 (Reuters) - National Australia Bank Ltd NAB.AX :
* NZX Regulation - due to operational error at nzx, bank of New Zealand subordinated notes are showing a minimum tradable amount of 5,000 rather than 1,000
* NZX Regulation -"error will be addressed overnight and bnz090 will be available to trade with a minimum tradable amount of 1,000 from Monday 21 December 2015"
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