; and (ii) may not have been awarded, at any time, a planning grant under this paragraph. (C) Application A State that wishes to be awarded a planning grant under this paragraph shall, not later than 60 days after the date on which the notice of funding availability with respect to the grant is released, submit to the Assistant Secretary an application, in a format to be determined by the Assistant Secretary, that contains the following materials: (i) A description of the entity selected to serve as the administering entity for the State, as described in subsection (b). (ii) A certification from the State that, not later than 1 year after the date on which the Assistant Secretary awards the planning grant to the State, the administering entity for that State will submit to the Assistant Secretary a State Digital Equity Plan developed under this subsection, which will comply with the requirements of this subsection, including the requirements of paragraph (2). (iii) The assurances required under subsection (e). (D) Awards (i) Amount of grant The amount of a planning grant awarded to an eligible State under this paragraph shall be determined according to the formula under subsection (d)(3)(A)(i). (ii) Duration (I) In general Except as provided in subclause (II), with respect to a planning grant awarded to an eligible State under this paragraph, the State shall expend the grant funds during the 1-year period beginning on the date on which the State is awarded the grant funds. (II) Exception The Assistant Secretary may grant an extension of not longer than 180 days with respect to the requirement under subclause (I). (iii) Challenge mechanism The Assistant Secretary shall ensure that any eligible State to which a planning grant is awarded under this paragraph may appeal or otherwise challenge in a timely fashion the amount of the grant awarded to the State, as determined under clause (i). (E) Use of funds An eligible State to which a planning grant is awarded under this paragraph shall, through the administering