China is set to allow a shipment of Australian coal into the country, according to a person familiar with the matter, despite a ban on such imports remaining in place as tensions between Beijing and Canberra escalate. A cargo of 135,000 tons of Australian thermal coal on the vessel Alpha Era, which has been waiting since late May to unload at the southern Chinese port of Fangchenggang, is expected to clear customs and is bound for a local user, said the person, who asked not to be identified because the information is private. It isn’t clear why the cargo is expected to clear customs, said the person.

While it remains unclear why an exception seems to have been made for the Alpha Era cargo, the shipment did arrive at Fangchenggang in late May. That’s about five months before Chinese officials verbally ordered traders to stop purchasing Australian coal.

Two other ships, the Dong-A Eos and the Dong-A Astrea, recently completed unloading Australian coal at the port of Jingtang, while a third vessel, the Dong-A Oknos, is in the process, according to data intelligence firm Kpler. It’s not clear if those cargoes will also be cleared by customs.