THe law states convicted felons - and much has to do with how long ago. My broher-in-law had a DUI in 1980 and they asked him at Highgate Crossing (QC) if he had any convictions and he said yes in 1980. They said OK and let him in. If he had said no the border cop told us they would have denied him entry. The system has records of all offenses but the felonies are what the folks in QC want to assess.