Secure Handling of Ammonium Nitrate Act of 2007

[AI summary unavailable — showing source text] Secure Handling of Ammonium Nitrate Act of 2007 - Amends the Homeland Security Act of 2002 to direct the Secretary of Homeland Security to regulate the purchase and sale of ammonium nitrate to prevent its misappropriation or use in a terrorist act. Requires the Secretary to establish: (1) a threshold percentage for ammonium nitrate for a substance to be treated as ammonium nitrate under this Act; and (2) a process by which each applicant for registration as the owner of an ammonium nitrate facility and any person who seeks to be an ammonium nitrate purchaser are required to register with the Department of Homeland Security (DHS) and are issued a registration number. Directs the Secretary to require the owner of a facility engaged in selling or transferring ammonium nitrate to maintain a record of each sale or transfer of ownership of ammonium nitrate for three years after such sale. Sets forth provisions regarding: (1) exempting persons producing, selling, or purchasing ammonium nitrate exclusively for use as an explosive material under a federal explosives license; (2) ensuring that access of agricultural producers to ammonium nitrate is not unduly burdened; (3) restricting the di…