Not all SROs are independent regulators(have government recognition).(page 141)
Not all independent regulators are SROs.
这两句话是不是就和page142的层级构架图冲突，层级构架图显示的是SROs和NON-SROs都是independent regulator
SORs without government recognition are not considered regulators.(page 143)这句和上述141页上述两句话，是不是可以推出，with government recognition—>independent regulators—>regulators 所以一些SORs就不是regulator.(所以SORs要想是regulator 得先满足是independent regulator?)
