Can a 19-year-old date a 17-year-old without the minor's parents' permission?

A 17 year old cannot do anything but breathe without her parents permission.

The age of consent and the age of majority are not the same thing. The age of consent is the age at which the state will no longer throw you in jail for having sex with her. It is not until the age of majority, which is 18 or older in every state, is the age at which the teen is able to move out and make her own rules and no longer needs the permission of her parents.