Above a certain threshold, which isn't that high btw, you don't just switch brackets, you switch from one fiscal regime into another. (politics.stackexchange.com)
BP benefited from UK fiscal regime changes, resulting an a $ 164 million tax credit in the third quarter, compared with a $ 1.16 billion tax bill in the same quarter last year. (fortune.com)
«We therefore have to re-examine our natural resource control and governance strategy, our resource fiscal regime from exemptions to carried interest, and how to use our natural resources to build a better and prosperous economies.» (3news.com)