Defense also cited reported errors by the Trial Chamber in determining his original non-commuted sentence of 35 years.
Joint Criminal Enterprise is a complex legal theory that groups suspects together in the planning and execution of crimes.
The tribunal has so far tried one suspect, Duch, and it is preparing for the potential joint trial of four more senior leaders.
Nearly 40,000 Cambodians live Lowell, and many of them were also victims of the Khmer Rouge.
A recent screening, in Battambang province's Samlot district, took place at a church five minutes from Duch's former home.
The administrative announcement comes a day after all four were indicted by prosecutors, who sent in their final submissions on Monday.
Duch was given a commuted sentence of 19 years for his role in the torture and execution of more than 12,000 people.
An estimated 2 million people, or a quarter of the population, perished under the regime.
With the verdict of Duch passed and the court now looking at its second case, some victims have not been satisfied.
The meeting in Lowell, Mass., will be an opportunity for the Cambodian community to get an update on complaints they filed to the court.
Former Khmer Rouge cadres contacted by VOA Khmer claimed the recent Duch's verdict had not caused concern in former Khmer Rouge areas.
The book was handed out at Tuol Sleng, which is now a museum, the mass grave site of Choeung Ek, and in Phnom Penh's Prey Sar commune.