Section 31

Any class or classes of companies, as the Securities and Exchange Board may provide by regulations in this behalf, may file a shelf prospectus with the Registrar at the stage of the first offer of securities included therein which shall indicate a period not exceeding one year as the period of validity of such prospectus which shall commence from the date of opening of the first offer of securities under that prospectus, and in respect of a second or subsequent offer of such securities issued during the period of validity of that prospectus, no further prospectus is required.

Only for one year from the date of opening of the first offer to issue Securities. However if any material changes made then Company should file such memorandum changes to ROC, SEBI & Investors.