Revise laws related to perjury and false swearing

This bill amends Montana laws on perjury and false swearing to clarify definitions, adjust penalties, and establish investigation requirements. It directly affects individuals who make false statements under oath in official proceedings, court cases, or notarized documents. The bill requires that credible allegations of perjury or false swearing be investigated by agencies outside the judiciary, mandates minimum prison sentences ranging from 6 months to 10 years for perjury convictions, and clarifies rules about inconsistent statements and materiality. Additionally, it maintains existing protections for defendants, such as allowing retractions before a falsification substantially affects a proceeding and limiting convictions when proof relies solely on one witness.