; or (2) the Commission shall make the determination described in section 309(k)(3) and deny the request, including any amendment to the request. (g) Modification of license or grant of market access (1) Major modifications (A) NGSO license major modifications Except as provided in paragraphs (2), (3), and (4) of this subsection and in subsection (m), and not later than 1 year after the date on which the Commission receives a request to modify a license granted under subsection (c)(1), the Commission shall grant or deny the request (including any amendment to the request). (B) GSO license and grant of market access major modifications Except as provided in paragraphs (2), (3), and (4) of this subsection, the Commission may grant a request (including any amendment to the request) to modify a license granted under subsection (c)(2) or a grant of market access granted under subsection (d). (2) Expedited treatment for minor modifications (A) NGSO license modifications Except as provided in paragraphs (3) and (4) of this subsection and in subsections (h) and (m), and not later than 90 days after the date on which the Commission receives a request to modify a license granted under subsection (c)(1), the Commission shall grant the request, including any amendment to the request, if the request is limited only to modifications, or a class of modifications, that— (i) increase transmission capacity; (ii) improve spectral efficiency, such as by improving compression technologies; or (iii) otherwise do not substantially modify the space station authorized by the license. (B) GSO license modifications Except as provided in paragraphs (3) and (4) of this subsection and in subsections (h) and (m), and not later than 90 days after the date on which the Commission receives a request to modify a license granted under subsection (c)(2), the Commission shall grant the request, including any amendment to the request, if the request is limited only to modifications, or a class of modifications, that— (i) increase transmission capacity