Yes.  If you are level two or level three, you have a right to bring a petition for modification asking for your risk level to be lowered under Corrections Law § 168-o.  You can only bring a petition for modification once a year and you bear the burden of proving by clear and convincing evidence that you are entitled to a lower level.  If you are a level two, you can also ask to be released from registration altogether – but only after thirty years on the registry.