The main purpose of the Solidify Iran Sanctions Act of 2025 is to strengthen and extend the sanctions imposed on Iran under the Iran Sanctions Act of 1996. This legislation aims to eliminate the sunset provision that would have allowed these sanctions to expire after a certain period. By doing so, the Act seeks to ensure that the United States continues to hold Iran accountable for its activities related to weapons development and support for terrorism. Key provisions of this Act include the repeal of the sunset clause in the original Iran Sanctions Act.