IIRC, I read that ISC tickets are sent to the owner of the vehicle (the insurer) by the plates, who may not have been the driver at the time of the capture. One should always be innocent unless proven guilty or you admit to the allegation by paying for it, which can then be disputed normally as you would for any VT... In this case points are not added to the driver's record, unless, once again, you admit to it or are proven guilty.
If the owner gets the ticket, and they are not the alleged offender, then I believe they have to nominate the offending driver by submitting a form (with their acknowledgement, of course), and then it gets reissued to the appropriate driver. If none of that happens, the owner of the vehicle shall always be the alleged offender by default, and they have to pay the fine, along with the points that follow.
I hope that helped, I think my information is correct.