Plan, which we have already implemented." While once again expressing "regret" that the IAEA was not able to provide Iran with copies of the documentation concerning the alleged studies, the report also urged Iran to provide the IAEA with "substantive information to support its statements and provide access to relevant documentation and individuals" regarding the alleged studies, as a "matter of transparency". The IAEA submitted a number of proposals to Iran to help resolve the allegations and expressed a willingness to discuss modalities that could enable Iran to demonstrate credibly that the activities referred to in the documentation were not nuclear-related, as Iran asserted, while protecting sensitive information related to its conventional military activities. The report does not indicate whether Iran accepted or rejected these proposals. The report also reiterated that IAEA inspectors had found "no evidence on the actual design or manufacture by Iran of nuclear material components of a nuclear weapon or of certain other key components, such as initiators, or on related nuclear physics studies ... Nor has the Agency detected the actual use of nuclear material in connection with the alleged studies" but insisted that the IAEA would not be able to formally verify the peaceful nature of Iran's nuclear program unless Iran had agreed to adopt the requested "transparency measures." February 2009 report In a report on 19 February 2009 to the Board of Governors, ElBaradei reported that Iran continued to enrich uranium contrary to the decisions of the Security Council and had produced over a ton of low enriched uranium. Results of environmental samples taken by the IAEA at the FEP and PFEP5 indicated that the plants have been operating at levels declared by Tehran, "within the measurement uncertainties normally associated with enrichment plants of a similar throughput." The IAEA was also able to confirm there was no ongoing reprocessing related activities at Iran's Tehran Research Reactor and Xenon Radioisotope Production Facility. According to the report, Iran also continued to refuse to provide design information or access to verify design information for its IR-40 heavy water research reactor. Iran and the IAEA in February 2003 agreed to modify a provision in the Subsidiary Arrangement to its safeguards agreement (Code 3.1) to require such access. Iran told the IAEA in March 2007 that it "suspended" the implementation of the modified Code 3.1, which had been "accepted in 2003, but not yet ratified by the parliament",