EXCLUSIVE

Legal changes to ensure stamp duty is paid when mining companies and property developers sell rights they have over land have been scrapped by the NSW government after almost a year to allow "further consultation with industry and professional bodies".

"The government has not put forward a case as to why is has ... decided to forgo millions": Greens MP Jeremy Buckingham.

A bill containing the changes was introduced on behalf of then treasurer Mike Baird in May last year by the Dubbo MP Troy Grant, who was then parliamentary secretary for natural resources.

"For stamp duties purposes, mining tenements have historically been regarded as interests in the land over which they are granted," Mr Grant told the Parliament.