Isla Holbox, the car-free island off Mexico's Yucatán coast beloved for its shallow turquoise water and laid-back beach bars, is at the centre of a federal court case. Prosecutors have formally charged a local man with running a business on land that belongs to the nation, without any of the concessions or permits required to use it.

Mexico's Attorney General's Office (FGR) announced the indictment on Wednesday against a Holbox resident identified only as Evelio "N", under the General Law of National Assets. The alleged offence is using federal property without authorisation from the competent authority. The case began when the state Attorney General's Office sent a file to federal prosecutors showing facts that fell under federal jurisdiction, prompting the FGR to take over and seek a judicial ruling.

The property in question sits on Damero Avenue, one of the sandy streets running through the island's small town centre. According to prosecutors, a business had been operating there irregularly, with no concession, permit or authorisation behind it. A judge has allowed the case to proceed and imposed a precautionary measure requiring the defendant to report periodically each month. He is due back in court next month.

For visitors, the case is a window into an issue that shapes the island behind the postcard views. Holbox sits within the Yum Balam biosphere reserve, and much of the surrounding land is either protected or federal. That means businesses — from beach clubs to restaurants — need concessions to operate legally, and pressure from rapid tourism growth has made unauthorised construction a recurring flashpoint on the island and across the wider Riviera Maya. Mexican authorities have increasingly targeted illegal builds and operations on national and protected land, sometimes resulting in closures or demolitions that catch travellers off guard.

There's no indication yet of what will happen to the business on Damero Avenue, and the accused has only been charged, not convicted. But the case matters for travellers in practical ways: choosing established, properly licensed operators helps keep your trip disruption-free, and it's worth checking before booking that a beach club, hotel or tour outfit is operating legally, especially on beachfront or reserve land. If a much-photographed spot suddenly has fencing and officials at the gate, this is usually why.

For now, Holbox remains open for business as usual — golf carts, bioluminescent night swims, flamingo-spotting boat trips and all. The defendant returns to court next month, when the case should clarify how firmly the federal government intends to enforce land rules on one of Mexico's fastest-growing island destinations.