The US could require bonds of up to $15,000 for some tourist and business visas under a pilot program launching in two weeks, a government notice said on Monday, an effort that aims to crack down on visitors who overstay their visas.

The program gives US consular officers the discretion to impose bonds on visitors from countries with high rates of visa overstays, according to a Federal Register notice. Bonds could also be applied to people coming from countries where screening and vetting information is deemed insufficient, the notice said.

President Donald Trump has made cracking down on illegal immigration a focus of his presidency, boosting resources to secure the border and arresting people in the US illegally.

He issued a travel ban in June that fully or partially blocks citizens of 19 nations from entering the US on national security grounds.

Trump's immigration policies have led some visitors to skip travel to the United States. Transatlantic airfares dropped to rates last seen before the COVID-19 pandemic in May and travel from Canada and Mexico to the US fell by 20% year-over-year.

Effective August 20, the new visa program will last for approximately a year, the government notice said. Consular officers will have three options for visa applicants subjected to the bonds: $5,000, $10,000 or $15,000, but will generally be expected to require at least $10,000, it said.

A similar pilot program was launched in November 2020 during the last months of Trump's first term in office, but it was not fully implemented due to the drop in global travel associated with the pandemic, the notice said.

The State Department was unable to estimate the number of visa applicants who could be affected by the change. Many of the countries targeted by Trump's travel ban also have high rates of visa overstays, including Chad, Eritrea, Haiti, Myanmar and Yemen.

Numerous countries in Africa, including Burundi, Djibouti and Togo also had high overstay rates, according to US Customs and Border Protection data from fiscal year 2023.