The US government has urged Turkey to drop its new practice of demanding additional protection and indemnity certification for tankers crossing the Bosphorus.
P&I clubs have refused to comply with the requirement introduced on 1 December, a few days before the West tried to impose a price cap on Russian oil.
The refusal of P&I clubs in the International Group to provide the blanket, ex-ante assurances has caused Turkish authorities to refuse the passage of at least 21 laden tankers through the strait.