The U.S. Consumer Product Safety Commission ordered the ban on the popular cribs late last year amid growing evidence they had played a role in the suffocation and strangulation deaths of dozens of infants over the past decade.
Hotels, motels and daycare centers will only be allowed to continue to use them for another 18 months.
The new rules also require manufacturers to make mattress supports and hardware used in cribs stronger and more durable, and to subject their products to more rigorous safety testing.
