Service Act will be submitted after the date of the approval of the endemic orphan fungal disease drug application. There is no limit on the number of times a priority review voucher may be transferred before such voucher is used. (3) Notification (A) In general The sponsor of a human drug application shall notify the Secretary not later than 90 calendar days prior to submission of the human drug application that is the subject of a priority review voucher of an intent to submit the human drug application, including the date on which the sponsor intends to submit the application. Such notification shall be a legally binding commitment to pay for the user fee to be assessed in accordance with this section. (B) Transfer after notice The sponsor of a human drug application that provides notification of the intent of such sponsor to use the voucher for the human drug application under subparagraph (A) may transfer the voucher after such notification is provided, if such sponsor has not yet submitted the human drug application described in the notification. (c) Priority Review User Fee (1) In general The Secretary shall establish a user fee program under which a sponsor of a human drug application that is the subject of a priority review voucher shall pay to the Secretary a fee determined under paragraph (2). Such fee shall be in addition to any fee required to be submitted by the sponsor under chapter VII. (2) Fee amount The amount of the priority review user fee shall be determined each fiscal year by the Secretary and based on the average cost incurred by the agency in the review of a human drug application subject to priority review in the previous fiscal year. (3) Annual fee setting The Secretary shall establish, before the beginning of each fiscal year beginning after September 30, 2019, for that fiscal year, the amount of the priority review user fee. (4) Payment (A) In general The priority review user fee required by this subsection shall be due upon the submission of a human drug application under section