In recognition of these actions, the U.S. under the Bush administration began the process of normalizing relations with Libya. The U.S. terminated the applicability of the Iran and Libya Sanctions Act to Libya and President Bush signed an Executive Order on September 20, 2004 terminating the national emergency with respect to Libya and ending IEEPA-based economic sanctions. This action had the effect of unblocking assets blocked under the Executive Order sanctions. Restrictions on cargo aviation and third-party code-sharing have been lifted, as have restrictions on passenger aviation. Certain export controls remain in place.