HELENA – After a lengthy debate, the Montana Senate has given initial approval to a bill that would codify a definition of sex into state law, as male and female. Republican pushed Senate Bill 458 passed 28-22 Wednesday on a preliminary vote. Supporters said it made a relatively simple change, but opponents warned the effects could be broader than expected, including possible discrimination for people whose development doesn’t fit the bill. The Senate did add an amendment to the bill Wednesday that seeks to address concerns about how the bill would affect intersex people.