House Bill 166 aims to remove the termination date for the Montana Historical Society Membership Special Revenue Account and the Montana Original Governor's Mansion Special Revenue Account. The bill specifically repeals Section 6 of Chapter 423 from the Laws of 2015, which likely contained the original termination provisions for these accounts.

Additionally, the bill stipulates that it will take effect immediately upon passage and approval. This legislative change is intended to ensure the continued funding and support for the Montana Historical Society and the Governor's Mansion without the constraints of a termination date.