Governor Katie Hobbs has a rare opportunity to do something with the overwhelming support of her citizens, and that would make her a groundbreaker. She could become the first female governor to sign the Women’s Bill of Rights.

This shouldn’t take courage. This legislation, which was just passed by the Arizona state house, defines words like “woman” and “female” so when it comes to laws that use these words, we can all speak a common language. The bill also declares the state’s important interest in preserving female-only spaces and opportunities when privacy, safety, or fairness are implicated. Importantly, this law doesn’t prevent policymakers or local leaders from deciding to allow trans-identifying individuals from being included in any arena, but it gives us a language so that there is truth in advertising, and we have the ability to reserve some spaces and opportunities just for women.

We both know personally why this is so important.

I, Paula Scanlan, was a teammate of Lia Thomas at the University of Pennsylvania. Governor Hobbs, you’ve undoubtedly heard about how Lia Thomas – formerly Will Thomas when he competed on the men’s team – took competition spots, won titles, and smashed female records from female swimmers like me. But perhaps you haven’t heard about what it was like to have to share a locker room with him. As a sexual assault survivor, I was forced to change next time him, and have him undress just a few feet away from me, often several times a day. When I tried to tell administrators that I was uncomfortable sharing such private spaces with fully intact men, they told me I should get counseling, that I shouldn’t complain, and that they didn’t care about how this felt to me or the other women on my team.

I, Christy Narsi, serve as a chapter leader for Independent Women’s Network in Phoenix, and I hear daily from moms who are concerned about the message that we are sending our daughters today. We hear of mothers who are concerned about their daughters’ safety when they are forced to face bigger, stronger male-bodied athletes on the athletic fields. My colleague, Payton McNabb, had to face a male volleyball player on the court when she was a junior in high school. He spiked the ball in her face so hard that she had a serious concussion and brain injury. More than two years later, she still has partial paralysis. Why are women and girls’ safety concerns being brushed aside? Why is it that women and girls are being told that they need to step aside, that their dreams and aspirations don’t matter and have to be sacrificed for male-bodied athletes who want to join the women’s teams?

Governor Hobbs, as I’m sure you know, this is about more than just sport. Women’s rights—and the very concept of womanhood—are under assault as never before in history. Inmates in women’s prisons are being put at risk when they allow male prisoners—including violent sex offenders—into women’s prisons around the country. Men are entering female sororities, domestic violence shelters, and educational training programs that were created specifically to encourage women’s engagement.

Overwhelmingly Americans recognize that it isn’t fair to force women to compete against biological men. To back up this common sense is hard scientific data, like that outlined in the Competition Report, which shows that a human being who goes through male puberty, when testosterone levels rise by about 20 times, enjoys an irreversible advantage in strength and athletic power. Taking testosterone suppressors later in life doesn’t change that reality. Data shows that men have physical advantages—not just in terms of strength and speed but in lung capacity and how their hearts process blood—that are hard-wired in their bodies. This is why there are women’s leagues and competitions in the first place, and why it is simply dangerous and inhumane to have female inmates forced to share their spaces with men.

We are so grateful that Arizona’s state legislature decided to do something about it by passing this truth-in-advertising legislation. We hope that you will sign this bill into law and stand up for women’s rights in Arizona—and be a model for others across the nation.