Which offense is NOT a reason for license suspension?

Driving with an expired registration is not typically a direct cause for license suspension in Massachusetts. While it is essential to maintain current registration, the penalties for failing to register a vehicle or allowing it to expire generally involve fines or administrative fees rather than suspension of the driver's license itself.

On the other hand, offenses such as failing to register as a sex offender, failing to pay child support, and involvement in drug trafficking are serious legal violations. These can lead to a suspension of driving privileges, as they are connected to broader legal or public safety issues. For instance, failure to pay child support can result in license suspension to encourage compliance with obligations, while sex offender registration and drug trafficking are serious criminal matters that could also jeopardize public safety. Thus, driving with an expired registration stands out as a less severe issue that does not lead to suspension.