North Korean leader Kim Jong Un and top military officials adopted a new “major military action plan” for “frontline” units along the border with South Korea, according to state media on Friday, a move experts said could refer to a change in nuclear weapons policy.

The decision came during a three-day Central Military Commission (CMC) meeting that wrapped up Thursday after discussions about “enhancing” the ability of frontline units to execute orders and “revising the military organizational structure.”