The first round, consisting of 498 Simplified characters from 502 Traditional characters, was promulgated by the Ministry of Education in 1969. The second round, consisting of 2287 Simplified characters, was promulgated in 1974. The second set contained 49 differences from the Mainland China system; those were removed in the final round in 1976. In 1993, Singapore adopted the six revisions made by Mainland China in 1986. However, unlike in mainland China where personal names may only be registered using simplified characters, parents have the option of registering their children's names in traditional characters in Singapore.