No time period is defined for obtaining Certificate of Commencement of Business (COB).
A public limited company having share capital cannot commence business until it has obtained the certificate to commence business from the Registrar of Companies. Normally, when a public company is incorporated, it may take sometime before it decides to make a public offer and issue a prospectus. However, a new company will comply with the required formalities and obtain the commencement of business certificate from the Registrar as soon as possible after formation because it cannot commence any business activities or exercise its borrowing powers without it.