The Trump administration is set to require travelers from visa-exempt countries to disclose their social media activity from the past five years before entering the United States, according to a notice published in the Federal Register.

The proposal would impact visitors from 42 nations, including the United Kingdom, France, Australia, Japan, and other U.S. allies, who currently do not need a visa for short-term travel. Presently, these travelers only have to apply through the Electronic System for Travel Authorization (ESTA), providing basic personal details.

Under the new rules, applicants would be required to provide their social media histories from the last five years as a mandatory component of their ESTA applications. In addition, travelers would need to submit other “high-value data fields,” such as phone numbers used over the past five years, email addresses from the past decade, personal information about family members, and biometric data.

The notice gives the public 60 days to submit comments on the proposed changes.

Customs and Border Protection (CBP), which is part of the Department of Homeland Security (DHS), said the updates aim to enforce an executive order issued earlier this year, with the stated goal of denying entry to foreigners who may pose a threat to national security or public safety.

Critics, however, warn that the proposed rules could discourage travel to the U.S., potentially affecting tourism, especially ahead of the 2026 FIFA World Cup, which the country will host along with Mexico and Canada.

The administration has stepped up efforts over the past year to strengthen immigration and security measures. These efforts include tighter vetting of visa applicants abroad, as well as increased scrutiny of individuals already in the U.S. who are applying for asylum, green cards, or citizenship. U.S. Citizenship and Immigration Services (USCIS) has instructed officials to review social media activity for indications of anti-American views and to assess the “good moral character” of applicants seeking naturalization.

The changes, which would also transform ESTA into a more mobile-focused process, are part of a broader campaign by the Trump administration to enhance immigration screening and tighten entry into the United States.