Vested Portion means, at any time, the portion of an Option which has become vested, as described in Section 3 of this Agreement.
Unused Portion has the meaning assigned to that term in Section 2.09(a).
Existing portion means that land surface area of an existing waste management unit, included in the original Part A permit application, on which wastes have been placed prior to the issuance of a permit.
Extended Use Period means the period beginning on the 1st day in the compliance period on which such building is part of a qualified low-income housing project, and ending on the later of the date specified by such agency in such agreement, or the date which is 15 years after the close of the compliance period.
Closed portion means that portion of a facility which an owner or operator has closed in accordance with the approved facility closure plan and all applicable closure requirements. (See also “active portion” and “inactive portion”.)