Complex sentence: It authorizes the FDA to order post-marketing surveillance for specified medical devices either at the time of their approval or clearance or at any time thereafter and requires device manufacturers to start surveillance not later than 15 months after the date the FDA issues an order.
Split into simpler sentences: It authorizes the FDA to order post-marketing surveillance for specified medical devices either at the time of their approval or clearance or at any time thereafter. It requires device manufacturers to start surveillance not later than 15 months after the date the FDA issues an order.