Waiver Details and Legal Basis

On June 30, 2025 the President invoked section 307(d)(1)(B) of the Chemical and Biological Weapons Control and Warfare Elimination Act of 1991 (22 U.S.C. 5605(d)(1)(B)) to declare a "fundamental change" in the leadership and policies of the Syrian Arab Republic and to waive all sanctions that had been imposed in response to the Assad regime's use of chemical weapons against its own population, with the sole exception of the restriction on arms sales and related financing [1]. The waiver was formalized in a Federal Register notice dated September 16, 2026, and it left the arms‑related prohibitions in place pending a further determination.

A subsequent determination on August 20, 2026 by the Under Secretary for Arms Control and Nonproliferation concluded that it was essential to United States national security to also waive the remaining arms‑sale and financing restrictions, effectively removing the last barrier to conventional military trade with Syria [1]. The legal framework for both actions rests squarely on the authority granted by the 1991 Act, which allows the President to suspend sanctions when a qualifying change in a target state's conduct or governance occurs.

Strategic Rationale Behind the Decision

The administration framed the June 2025 waiver as a calibrated response to observable shifts in Syrian governance, signalling that Washington would reward moves away from the chemical‑weapon calculus that had previously justified punitive measures [1]. By retaining the arms‑sale ban initially, the policy preserved a lever of influence while testing the durability of Syria's new political trajectory.

The August 2026 waiver of the arms restrictions reflects a judgment that continued prohibition would no longer serve U.S. strategic interests. The Under Secretary’s assessment linked the removal of the final barrier to broader national‑security calculations, suggesting that renewed engagement in the conventional arms market could bolster stability, create channels for influence, and counterbalance Iranian and Russian footholds in the region [1].

Regional and Policy Implications

The dual‑phase waiver reshapes the calculus for regional actors. Syria’s access to U.S. arms markets, even if limited, may reduce its reliance on Russian military supplies and could open avenues for diplomatic coordination with neighboring states wary of Tehran’s expansion. The move also signals to allies and adversaries alike that Washington is willing to adjust its punitive toolkit when it perceives a genuine policy shift in a traditionally hostile regime.

Domestically, the waivers establish a precedent for employing the 1991 Act’s flexibility to calibrate sanctions in response to political change. The approach demonstrates that the United States can retain a graduated sanctions architecture—first lifting most measures, then reassessing the final lever—rather than opting for an all‑or‑nothing reversal. This could inform future decisions regarding other sanctioned states where leadership transitions are underway.

Unresolved Issues and Future Signals

The record does not address whether the arms‑sale restriction will ultimately be lifted or what concrete benchmarks would trigger a full normalization of military trade with Syria. Likewise, the Federal Register notice provides no detail on monitoring mechanisms to verify that the "fundamental change" in Syrian policy is sustained over time.

Future signals that could indicate a further shift include a formal declaration by the President or the Under Secretary that the arms‑sale prohibition has been permanently waived, or a congressional report confirming compliance with the conditions underlying the original 1991 Act waiver. Until such steps are taken, the Syrian sanctions regime remains partially active, and the United States retains a strategic fallback should the Syrian government’s trajectory reverse.