From Richard Winger at Ballot Access News:
The United Independent Party is ballot-qualified in Massachusetts. However, since it doesn’t expect to run a presidential candidate in 2016, and because President is the only statewide office on the ballot in 2016 in Massachusetts, the party will lose its qualified status in November 2016 unless it has registration membership of 1% of the number of registered voters.
According to this story, the party has 2,300 registered members, and needs about 43,000 by November 2016. The party’s registration drive began in December 2014.