Congressional Budget Office Cost Estimate: S. 1657, South China Sea and East China Sea Sanctions Act of 2021 [open pdf - 161KB]
This is the Congressional Budget Office (CBO) Cost Estimate as reported by the Senate Committee on Foreign Relations on October 28, 2021. From the Document: "S. 1657 would authorize the Administration to impose sanctions on Chinese persons, including senior officials in the Chinese government, who support China's island-building activities in the South China Sea. The bill also would require the Department of State to submit an annual report to the Congress for three years after enactment listing countries that have taken an official stance recognizing China's sovereignty in disputed territory or airspace."
Congressional Budget Office: http://www.cbo.gov/