from Jim Baumbach and Robert Brodsky of Newsday,

The Barclays Center has taken the first preliminary step toward a potential opt-out of its 25-year deal with the Islanders, according to sources.

Brooklyn Sports & Entertainment, which runs the Barclays Center and the renovated Nassau Coliseum, recently notified the Islanders in writing that the window to renegotiate the terms of the license agreement is open, as per the terms of the contract.

The two sides have until Jan. 1, 2018, to renegotiate the terms, according to the summary of the license agreement previously obtained by Newsday. If no new deal is reached, the two sides can stay with the current deal or choose to opt out. Each side would have until Jan. 30, 2018, to deliver an opt-out notice in writing.

If the Islanders decide to opt out, the team can choose to leave at the end of next season or the end of the 2018-19 season. If Barclays triggers the opt-out, the Islanders would have to leave after the 2018-19 season.

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