See this below, (look at the phrase national laws - Hyde act is US national law)
ARTICLE 2 - SCOPE OF COOPERATION
1. The Parties shall cooperate in the use of nuclear energy for peaceful purposes in accordance with the provisions of this Agreement. Each Party shall implement this Agreement in accordance with its respective applicable treaties, national laws, regulations, and license requirements concerning the use of nuclear energy for peaceful purposes.
Section of Hyde Act that talks about termination, SEC. 106. INOPERABILITY OF DETERMINATION AND WAIVERS.
A determination and any waiver under section 104 shall cease to be effective if the President determines that India has detonated a nuclear explosive device after the date of the enactment of this title.
Read these two things together. When India and US are friends, these don't matter. What if US doen't like India sometime in future.
