Any certificate, right-of-way, permit, lease, or other authorization issued or granted pursuant to the direction under subsection (a) of this section shall include the terms and conditions required by law unless waived pursuant to a resolution under section
719f
(g) of this title, and may include terms and conditions permitted by law, except that with respect to terms and conditions permitted but not required, the Federal officer or agency, notwithstanding any such other provision of law, shall have no authority to include terms and conditions as would compel a change in the basic nature and general route of the approved transportation system or those the inclusion of which would otherwise prevent or impair in any significant respect the expeditious construction and initial operation of such transportation system.