Payment Period Start Date

Example Definitions of "Payment Period Start Date"
Payment Period Start Date. Means, on a Product-by-Product and country-by-country basis, (a) if the First Commercial Sale of such Product in such country has occurred on or before April 1, 2019, then April 1, 2019, or (b) if the First Commercial Sale of such Product in such country occurs after April 1, 2019, then the date of the First Commercial Sale of such Product in such country.
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