The public trust doctrine is based on the belief that certain common properties-such as running water,the seashore,and air-perpetual use was dedicated to the public,government to accept the people’s trust is entitled to the ownership of the property.Urban parks as the public trust property would impose restriction on attempts by governments to transfer the possession of parks held in trust or to devote it a private use.It could even impose restriction on the capability of government to divert parks from park use to another. The public trust doctrine is based on the belief that certain common properties-such as running water, the seashore, and air-perpetual use was dedicated to the public, government to accept the people’s trust is entitled to the ownership of the property. Urban parks as the public trust property would impose restriction on attempts by governments to transfer the possession of parks held in trust or to devote it a private use. It could even impose restriction on the capability of government to divert parks from park use to another.