No, they would also have to fill out the Nonresident Student Vehicle Information Form.

> $60 plate fee. If that's all we're looking at, it makes sense to cut bait and issue a stern warning at this point.

They'd also be on the hook for excise tax which is $25 per $1000 of value (based on a percentage of MSRP based on how old the car is)

College students are excluded from this requirement

> Exemption for Enrolled Students: While nonresidents who are enrolled as full-time students in Massachusetts schools, colleges, and universities do not have to register their out-of-state vehicles in Massachusetts, they must complete and file Nonresident Student Vehicle Information Form

The RMV has a specific clause around being in Massachusetts for 30 days.

Nonresidents Registering in Massachusetts

Even a nonresident (anyone whose legal residence is outside the Commonwealth) may be required to register and/or insure a motor vehicle or trailer in Massachusetts in certain situations. Following are some examples:

• Nonresidents whose primary residences are in other states may not operate motor vehicles ... in Massachusetts for more than 30 total days in one year unless they have liability insurance

https://www.mass.gov/doc/chapter-6-owning-a-vehicle/download

The Seinfeld episode itself was a parody of the 1991 Oliver Stone film "JFK", which is the much more likely inspiration.

https://www.youtube.com/watch?v=OSzszCTWFwg

Not fair... the 'R's were stolen by pirates...