Legislation
Under the current legislation, all political parties (termed "Political Associations") must be registered under the Societies Act. As such, the following rules pertaining to political associations apply:
All members of political parties must be Singaporean citizens. Political Association must not be affiliated or connected with any organisation outside Singapore. The fact that a political association uses a name or symbol which is the same as that of an organisation outside Singapore shall be deemed to be sufficient evidence that the political association has an affiliation or connection with that organisation.
The government has the power to dissolve the party if it contravenes the above rules, or any other rule applicable to all forms of registered societies.
Original idea: https://harishpillay.wordpress.com/2011/04/23/way-before-2016-the-open-party/
The Open Party (TOP) and Green party and Pirate_Party