House Bill No. introduced by L. Brewster aims to revise the coal severance tax coal washing credit by extending its termination date. The bill amends existing laws, specifically Section 7 of Chapter 433 from 2009 and Section 352 of Chapter 1 from 2015, changing the termination date from July 1, 2017, to July 1, 2027. This extension allows for continued benefits related to coal washing and the definition of "contract sales price" as outlined in the amendments.

Additionally, the bill includes provisions for notifying tribal governments, requiring the secretary of state to send a copy of the act to each federally recognized tribal government in Montana. It also establishes that the act will take effect immediately upon passage and approval.