The governments of Guernsey and Jersey have extended their alliance with the Ille-et-Vilaine department of France.
The Memorandum of Understanding facilitates collaborative efforts in fields like trade, foreign aid, and education.
A first-time memorandum was also signed by the Channel Islands and Brittany.
The agreement, according to Log Chesnais-Girard, president of the regional council of Brittany, will strengthen its ties to the islands.
While Brexit might have caused a rift, he claimed that it instead helped to strengthen the bonds between Brittany and Normandy and the Channel Islands.
"I thank our partners in Jersey and Guernsey for favoring the path of dialogue and cooperation; I am convinced that this path will best defend the interests of all of our citizens. ".
The yearly political summit, which was held in Guernsey, covered "many regional issues" and provided a forum for "discussions with regional partners on strategic issues.".
These included more extensive political connections and regions of shared interest in Europe and the European Union.
The new memorandum with Brittany, according to the governments of Guernsey and Jersey, will allow for discussion of issues relating to economic development, maritime connections, and relationships between ports.
It would "enable us to deepen the connections that we have with the entire of this significant region to the south of us," according to Deputy Jonathan Le Tocq, a member of the Policy and Resources Committee.
The new partnership, he said, "will enable us to focus on new areas as well as build on our existing links, working with some of our closest neighbors," as regions in the French political system have different mandates and responsibilities to departments.
The partnership with Ille-et-Vilaine was extended for another three years, according to Deputy Philip Ozouf, Minister for External Relations, who claimed this demonstrated their "close and fruitful relationship.".
He declared: "The fact that we are renewing our partnership is testament to the enduring nature of our ties, and I am looking forward to working with you on projects over the coming three years.
"I want to make sure that these bonds grow closer and more amicable so they can continue to enhance our respective jurisdictions in the long run.
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