The recently instituted regulatory measures for Tanzania's minerals resource have been perceived differently. On one hand, the measures are perceived as being justifiable in reference to resource sovereignty perspective but, on the other hand, the same measures are seen as unjustifiable in reference to regulatory opportunism perspective. This puzzle is yet to be addressed due to lack of rigorous analyses focusing on subject matter and due to narrow application of aforementioned frameworks in the existing analyses. The proposed study plans to use the two frameworks to address the puzzle. The study will base on both qualitative and quantitative methodology in which qualitative data will be obtained from in-depth interviews with key informers – the regulators and the regulated while quantitative data will be obtained from existing documents in archives. The data will be cross-checked to ascertain its accuracy before it gets analysed by both statistical and thematic analytical tools.