Rep. Peter Roskam (R., Ill.) told the Washington Free Beacon in an interview that the Obama administration still needs to address a “serious legal question” about the nuclear deal and the Iran Nuclear Agreement Review Act, which allowed Congress to evaluate the agreement before it was fully implemented. According to the review act, lawmakers were supposed to be granted access to the text of the agreement as well as “any additional materials related thereto, including annexes, appendices, codicils, side agreements, implementing materials, documents, and guidance, technical or other understandings, and any related agreements.”

However, Roskam and other lawmakers have said that they have been prohibited from viewing the “side deals” that govern the International Atomic Energy Agency’s (IAEA) inspections of Iran’s nuclear facilities. Agency officials have said that such inspection deals typically remain confidential.

Further questions were raised about the secret side deals earlier this month when Iran said it obtained samples itself from Parchin—a military site where Tehran is suspected of conducting nuclear work—without agency officials present. Yukiya Amano, head of the agency, pushed back against those claims and said that “the agency can confirm the integrity of the sampling process and the authenticity of the samples.”