yes, that's part of it. If a statute dictates a standard of care and you violate it then you are "negligent per se".
The injury must be the type of injury the statute was designed to prevent:
violating speeding ordinance and causing accident. driving without license and causing an accident is NOT neligent per se.
The plaintiff must be in the class of person that the statue was designed to protect:
speeding violation that results in crashing into a building, not another car, is NOT neg per se.
and the violation of the statute MUST HAVE CAUSED the injury.
If you are speeding and rear end a car and the person gets out and gets smashed you are not negligent per se......
When is someone "negligent per se"?
I'm not 100% sure, but I believe it is when you break a law in the performance of a tort.