Sen. Tim Scott (R-SC) sent a letter Thursday to Treasury Secretary Janet Yellen raising concerns over the Biden administration’s overdue report to Congress on Iranian assets blocked by U.S. sanctions.

The Treasury Department’s report was due to Congress on May 24 and is a requirement under a provision included in the since-passed $95 billion national security supplemental package, which cleared the Senate in April. The report is intended to detail all of Iran’s assets outside of the oil-rich country, as well as details about any sanctions. To Scott, the report will ensure members of Congress have the necessary information about the murderous Iranian regime, potentially to craft legislation aimed at curbing the influence of Tehran.