Stop Iran's Nuclear Weapons Program Act of 2011

[AI summary unavailable — showing source text] Stop Iran's Nuclear Weapons Program Act of 2011 - Amends the Iran Sanctions Act of 1996 to impose sanctions on a person that knowingly enters into an agreement: (1) with Iran to purchase or provide payment for future delivery of Iranian petroleum resources, (2) to provide specified ancillary services, or (3) with the National Iranian Oil Company or affiliates for the development of petroleum resources wherever located. Imposes sanctions on a person that knowingly purchases, subscribes to, or facilitates the issuance of Iranian sovereign debt. Subjects a parent entity, with specified exceptions, to penalties for violations of certain sanctions regarding Iran committed by a subsidiary outside of the United States that would be subject to prohibitions if committed inside the United States or by a U.S. person. Prohibits with respect to Iran: (1) issuance of specified licenses to export or reexport civil aviation goods, services, or technology; and (2) such goods, services, or technology from being exported or reexported. Amends the Internal Revenue Code to eliminate amortization of geological and geophysical expenditure tax incentives if certain sanctions regarding the development of I…