Proceedings may19 be suspended or terminated without the imposition of provisional measures or anti-dumping duties upon receipt of satisfactory voluntary undertakings from any exporter to revise its prices or to cease exports to the area in question at dumped prices so that the authorities are satisfied that the injurious effect of the dumping is eliminated. Price increases under such undertakings shall not be higher than necessary to eliminate the margin of dumping. It is desirable that the price increases be less than the margin of dumping if such increases would be adequate to remove the injury to the domestic industry.