Once licences are revoked, the holders have to apply for a new one. According to the Customs Act, 1969, the customs house authority concerned may issue licences for C&F and shipping agents to represent importers and exporters and ship and container owners who are using the port. According to the law, the customs authority can also revoke the licences if they find evidence of irregularities and if the licences are not renewed on time. AKM Sultan Mahamud, deputy commissioner of customs, told The Daily Star that they revoked many licences on finding agents involved in irregularities. But they again resorted to irregularities using unused licences, he said.