52. Obligations of certain certificate holders to serve on Indian vessels
Every Indian citizen holding a certificate of competency or certificate of proficiency or certificate recognised under section 50, shall, at any time during which the security of India is threatened or during a proclamation of emergency issued under clause (1) of article 352 of the Constitution, be liable to serve on Indian vessel for such period and on such terms and conditions as the Central Government may, by general or special order, specify in this behalf.