House Bill No. proposes an amendment to Article II, Section 17 of the Montana Constitution, which aims to redefine the term "person" to include all members of mankind at any stage of development, starting from fertilization or conception. The bill specifies that this definition applies regardless of age, health, level of functioning, or condition of dependency. Additionally, it states that no cause of action may arise from harm caused to an unborn baby by an unintentional act of its mother, and it mandates that the legislature implement this section through appropriate legislation.

The bill also includes provisions for severability, ensuring that if any part of the act is deemed invalid, the remaining valid parts will still be in effect. It requires a two-thirds affirmative roll call vote from the legislature for passage, as it is a legislative proposal to amend the constitution. Furthermore, the act will be submitted to the qualified electors of Montana during the general election in November 2026, allowing voters to decide on the proposed constitutional amendment.