Montana has never been known as a black-tie place. Governors wear cowboy boots and bolo ties, and people joke that a tuxedo is a pair of black jeans and a sport coat. But this winter, when lawmakers arrive at the State Capitol, they will have to abide by a new dress code: No more jeans. No casual Fridays. And female lawmakers “should be sensitive to skirt lengths and necklines.”

Republican leaders who approved the guidelines say they are simply trying to bring a businesslike formality to a State Legislature of ranchers, farmers and business owners that meets for only four months every other year. But the dress code has set off a torrent of online mockery, and is being pilloried by Democratic women as a sexist anachronism straight from the days of buggies and spittoons....


Ms. Eck said she was leaving a health care forum in Helena, the capital, on Monday when one of her Republican colleagues peered at her and told her that he was glad to see she was dressed appropriately.

“It just creates this ability to scrutinize women,” Ms. Eck said. “It makes it acceptable for someone who’s supposed to be my peer and my equal to look me up and down and comment on what I’m wearing. That doesn’t feel right.”