Article 20. Cases of revocation of work permits 1. The work permit expires according to the provisions of Clauses 1, 2, 3, 4, 5, 6 and 7, Article 156 of the Labor Code. 2. Employers or foreign workers fail to comply with the provisions of Decree 152/2020/ND-CP on foreign workers. 3. Foreign workers, while working in Vietnam, fail to comply with Vietnamese laws, affecting social security, order and safety.