; or (III) the nature of the national critical capabilities sector involved in the covered activity or category of covered activities; or (ii) such other criteria as the Committee determines may result in a covered activity or category of covered activities posing a risk to the national security of the United States. (2) Exceptions The Committee, pursuant to regulations prescribed in accordance with section 1008— (A) may not prohibit under paragraph (1) a covered activity or category of covered activities for the conduct of the official business of the Federal Government, the United Nations, or international financial institutions or multilateral development banks (including their specialized agencies, programs, funds, and related organizations), or by employees, grantees, or contractors thereof