the initial transition facilitation plan, and, not later than 3 years after the Commission determines that the implementation of such additional transition facilitation plan is completed, the Transition Facilitator may submit another additional transition facilitation plan as described in this subsection. (f) Definitions In this section: (1) Clear The term clear means, with respect to electromagnetic spectrum between the frequencies of 3700 megahertz and 4200 megahertz, to make such spectrum available for allocation and the assignment of licenses through a system of competitive bidding under subsection (c)(1). (2) End user The term end user means any entity that— (A) is a licensee or registrant of an earth station receiving signals between the frequencies of 3700 megahertz and 4200 megahertz