It appears you are referring to the Drivers License Compact (DLC) which requires member states to report tickets received by motorists back to the state which they are licensed to drive.
Once the ticketing state reports the conviction of the violation back to the licensing state of the driver it is up that state's laws and statutes if the out of state citation will be placed on the motorist's driving record and assigned points.
There are at last count 5 states which do not participate in the DLC these states are Georgia, Massachusetts, Michigan, Tennessee and Wisconsin.
Even though these states are not members of the Drivers License Compact it does not mean that they do not have their own separate agreements with other states regarding the exchanging of ticket information.
The NRVC that you mentions stands for the Non-Resident Violator Compact which requires member states to suspend the drivers license of those who get traffic tickets for moving violations in other states and fail to pay them or otherwise comply with the citation. Alaska, California, Michigan, Montana, Wisconsin and Oregon do not participate in this agreement.
Back to the DLC, though there are 5 states that are not currently members of the agreement they all still seem to share and receive in information from some if not all other states.
The state of Georgia has other agreements with states to exchange information regarding traffic tickets their licensed drivers acquire out of state. The DDS states that the Department is authorized to suspend your license if its records or other evidence shows that you have accumulated 15 points within 24 months under the point system, including violations committed out of state.
According to the Massachusetts driver's manual, MA has arranged to share driving record and criminal violation information with other states. So even though Massachusetts is not a part of the DLC, they have their own agreements with other states to exchange violation information.
The RMV driver's manual goes on to say that certain traffic offenses committed by a MA licensed driver in other states will be placed on their MA driving record and treated by the RMV as if the offense had occurred in Massachusetts.
The Michigan Secretary of State (SOS) site notes that out of state offenses are likely to eventually appear on your Michigan driving record. Thus even though Michigan is not a member of the DLC it appears their DMV will still share and exchange information with other state's courts and Department of Motor Vehicles regarding traffic violations.
Tennessee dropped out of the DLC in 1997 so it is not currently a member of the agreement but the state still reports tickets back to your home state and other states can still report moving violations to the TN Department of Safety.
Even though Wisconsin is not a member of the DLC their Department of Transportation will still share and exchange information with other state's courts and Department of Motor Vehicles regarding traffic violations. Wisconsin records out of state traffic convictions on a WI driver's record but does not assess points.
To find out if your state has reciprocal agreements with any of these States check with your Department of Motor Vehicles. Or if you live in one of these 5 states you can check with the DMV or like agency to find out more about their agreements with other States.