SALT LAKE CITY — Utah became the first state to prohibit flying LGBTQ+ pride flags at schools and all government buildings after the Republican governor announced he was allowing a ban on unsanctioned flag displays to become law without his signature.

Gov. Spencer Cox, who made the announcement late Thursday night, said he continues to have serious concerns with the policy but chose not to reject it because his veto would likely be overridden by the Republican-controlled Legislature.

Starting May 7, state or local government buildings will be fined $500 a day for flying any flag other than the United States flag, the Utah state flag, military flags or a short list of others approved by lawmakers. Political flags supporting a certain candidate or party, such as President Donald Trump’s signature “Make America Great Again” flags, are not allowed.

The new law could stoke conflict between the state and its largest city. City buildings in liberal Salt Lake City typically honor Pride Month each June by displaying flags that celebrate its large LGBTQ+ population. Local leaders have illuminated the Salt Lake City and County Building in rainbow lights to protest the flag ban each night since the Legislature sent it to Cox’s desk.

Andrew Wittenberg, a spokesperson for Salt Lake City Mayor Erin Mendenhall’s office, said their attorneys are evaluating the law and the capital city does not yet have information on what it will do once the law takes effect.

The bill’s Republican sponsors, Rep. Trevor Lee and Sen. Dan McCay, said it’s meant to encourage “political neutrality” from teachers and other government employees. Opponents argued it aims to erase LGBTQ+ expression and take authority away from cities and towns that don’t align politically with the Republican Legislature.

In a letter to legislative leaders explaining his decision, Cox said he agreed with the “underlying intent” of the bill to make classrooms politically neutral but thought it went too far in regulating local governments. He also noted that by focusing narrowly on flags, the law does not prevent other political displays such as posters or lighting.

“To our LGBTQ community, I know that recent legislation has been difficult,” Cox said. “Politics can be a bit of a blood sport at times and I know we’ve had our disagreements. I want you to know that I love and appreciate you and I am grateful that you are part of our state. I know these words may ring hollow to many of you, but please know that I mean them sincerely.”

Cox’s decision came hours after the Sundance Film Festival announced it was leaving its home of four decades in Park City, Utah, for Boulder, Colorado. The flag bill created eleventh-hour tensions as some residents worried it would push the nation’s premier independent film festival out of state. Festival leaders said state politics ultimately did not influence their move from conservative Utah to liberal Colorado. They did, however, make “ethos and equity values” one of their criteria in a nationwide search for a new home and referred to Boulder in their announcement as a “welcoming environment.”

Utah’s flag law goes further than one signed last week in Idaho that only applies to schools. But Idaho Republicans are also advancing a separate bill to ban government buildings from displaying certain flags.

Florida lawmakers have advanced a proposal to ban pride flags and others that represent political viewpoints in schools and public buildings after similar measures failed in the past two legislative sessions. Some federal agencies, including the Department of Veterans Affairs, also have limited which flags can fly at their facilities.

Other flags permitted under the Utah law include Olympic and Paralympic flags, official college or university flags, tribal flags and historic versions of other approved flags that might be used for educational purposes