A Taiwanese man has been charged by local authorities in a case involving illegal oil sales to North Korea, the Taiwan Kaohsiung Prosecutors office confirmed in a press release on Thursday.

The businessman, Chen Shih-hsien, is charged with violations to sections 215 and 216 of the Criminal Code of the Republic of China, which relates to using a business to make false declarations.

The charges relate to Chen’s involvement in using ships to sell petroleum products to North Korea via prohibited ship-to-ship (STS) transfers on the high seas. Chen had previously been arrested and released on bail by a Taiwanese court