Treaties signed on behalf of China before 1949 are applicable only to the Republic of China on Taiwan. Conventions signed by Beijing include: Assistance in Case of a Nuclear Accident or Radiological Emergency Convention; Biological Weapons Convention; Chemical Weapons Convention; Conventional Weapons Convention; Convention on Early Notification of a Nuclear Accident; Inhumane Weapons Convention; Nuclear Dumping Convention (London Convention); Nuclear Safety Convention; Convention on the Physical Protection of Nuclear Material; Rights of the Child and on the Sale of Children, Child Prostitution, and Child Pornography Convention (signed Optional Protocol); and Status of Refugees Convention (and the 1967 Protocol).