Regulators at both the FDA and the Centers for Medicare and Medicaid Services may see reason to try to restrict use at first to the highest risk patients.
Such bilateral deals have allowed, for example, Britain and America to restrict coveted slots at London's Heathrow to two British and two American carriers.
The systems at Regal and Landmark include passwords and keys that restrict a particular film to play at a particular theater (and on a particular projector) at a predetermined time.
