repeatedly
(1) If the Commission finds after notice and hearing that the entity involved has willfully or repeatedly without good cause failed to comply with the requirements of this section, such failure shall constitute a substantial failure to comply with this subchapter. The failure to obtain certification under subsection (e) shall not itself constitute the basis for a determination of substantial failure to comply with this title. For purposes of this paragraph, the term “repeatedly”, when used with respect to failures to comply, refers to 3 or more failures during any 7-year period.