Citation(s) from the GunPolicy.org literature library
Kramer, Katherine. 2001 ‘Licence Renewal.’ Legal Controls on Small Arms and Light Weapons in South East Asia; Occasional Paper No. 3, p. 10. Geneva: Small Arms Survey, the Graduate Institute of International and Development Studies, Geneva and Nonviolence International South East Asia. 1 July
Laos and Singapore require a renewal every two years.