The latest limit is 21,000/-. It is effective from 1st April 2014, though the various High Courts have granted a stay on its retrospective implementation. You have to follow it effective from 01.04.2015 in any case.
In case you wish to seek professional advice on the matter, please feel free to connect with us.
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Kind Regards,
Avika Kapoor
Vice President - Operations
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Kapgrow Corporate Advisory Services Pvt. Ltd.