The Group of Seven (G7) nations intend to extend sanctions on Russia reducing exports to the aggressor in the Ukraine. During the 49th Summit to be held in Hiroshima, Japan on May 19-21, bans will be placed on the export of technical items including semiconductors that are used to enhance the offensive capabilities of the Russian Federation. Tariffs will be increased on metals and minerals exported by Russia.
Russia has indicated that should sanctions be intensified, they will withdraw from the Black Sea Grain Initiative which allows Ukraine to export agricultural commodities through functional Black Sea ports.
In this event, the EU nations, NATO may establish a convoy system to allow free passage through international waters in the Black Sea forcing the Russian Federation to either back down on its restrictions or to face consequences including naval confrontation.
Free passage through the Straits of Hormuz was imposed through Operation Earnest Will in 1977-1978 during the Iraq-Iran War with convoys escorted by naval vessels in the face of threats of restriction of tanker traffic by Iran.