President Barack Obama signed a wide-ranging defense bill into law Saturday despite having “serious reservations” about provisions that regulate the detention, interrogation and prosecution of suspected terrorists.

The bill also applies penalties against Iran’s central bank in an effort to hamper Tehran’s ability to fund its nuclear enrichment program. The Obama administration is looking to soften the impact of those penalties because of concerns that they could lead to a spike in global oil prices or cause economic hardship on U.S. allies that import petroleum from Iran.

In a statement accompanying his signature, the president chastised some lawmakers for what he contended was their attempts to use the bill to restrict the ability of counterterrorism officials to protect the country.