In late March in response to numerous media reports in Quebec and the US that suggested the Transmission Services Agreement (TSA) between Hydro-Quebec and Eversource outlining the financial arrangments between the two entities for the construction and operation of Northern Pass (if permitted) had expired, Sen. Jeanne Shaheen sent a letter to the Federal Energy Regulatory Commission asking for an update on the status of the TSA. This letter from FERC is in response.
FERC Acting Chair Cheryl. A. Lafleur notes in her letter that while the TSA is not "expired", the Commission "has not received any filing from either Party to modify the
Approval Deadline of February 14, 2017."
Thus the TSA would appear to be in a sort of limbo, out of date and referencing an earlier 1200MW version of the Northern Pass proposal.