Less than a week after Republican Governor Glenn Youngkin took office, a GOP senator has introduced a bill that seeks to prohibit transgender students from participating in sports.

Senator Jennifer Kiggans, a Republican from Virginia Beach, introduced Senate Bill 766 on Friday.

The bill would require that public and private schools organize their sports teams based on the “biological sex” of the athletes. The proposed legislation would also provide “civil penalties for students and schools that suffer harm as a result of a violation of the bill.”

During his gubernatorial campaign, Youngkin reiterated his opposition to transgender students playing on sports teams that are consistent with their gender identity.

In a tweet posted after the bill was introduced, the American Civil Liberties Union (ACLU) of Virginia said that it would “not tolerate” excluding transgender youth from sports.

“ATTN: SB 766 to ban trans kids in Virginia from participating in sports has just dropped,” the group wrote. “Let's be clear: This is part of an ongoing, nationwide effort to exclude trans people from enjoying the benefits of sports like their cisgender peers. We won't tolerate this.”