Once DRHP gets approved by SEBI, companies file RHP to the Registrar of Companies (RoC). The time gap between filling DRHP and RHP depends on when the company obtains SEBI&rsquo's approval.
When a company files DRHP, SEBI issues an observation letter within 30 days and companies have to incorporate all the required changes and modifications and refile DRHP within a year or 12 months. Once SEBI grants its approval on DRHP, it is converted into the final offer document as RHP.
RHP must be filed at least 3 days before the IPO offer opening date.