; and (III) if the receiving provider is preventing a subscriber of the receiving provider (referred to in this clause as the receiving subscriber ) from receiving calls or text messages originated by the originating subscriber because the receiving subscriber has requested that prevention, whether directly or through a call-blocking service, the Commission may not require the receiving provider to stop preventing the calls or text messages unless the receiving subscriber provides affirmative consent. (ii) Whitelisting (I) Request A subscriber that offers essential services (referred to in this clause as an essential services subscriber ) may request that the Commission require each receiving provider to allow subscribers of the receiving provider to receive calls or text messages originating from the essential services subscriber. (II) Grant If the Commission, through a rigorous vetting process using the unblocking system established under clause (iii), confirms the identity of an essential services subscriber described in subclause (I) of this clause, the Commission shall require each receiving provider to allow each subscriber of the receiving provider to receive calls or text messages originating from the essential services subscriber unless the subscriber of the receiving provider has requested under subparagraph (B)(ii)(III) that the receiving provider prevent the subscriber from receiving calls and text messages originating from that essential services subscriber. (III) Definition of essential services The Commission shall by regulation define the term essential services for purposes of this clause. (iii) Unblocking system and database (I) In general In order to carry out this subparagraph and ensure that consumers are in control of the calls and text messages they receive, the Commission shall establish a nationwide unblocking system that includes a database, to be known as the Unblocking Database , of subscribers whose identity the Commission has confirmed under clause (ii)(II). (II) Funding The