Market regulator SEBI has notified guidelines for investment advisers and their 'associated persons' making it compulsory for them to get requisite certifications to operate in stock markets.In a notification, Securities and Exchange Board of India (Sebi) has said that the investment advisers and their associated persons, including representatives and partners, offering investment advice, would need to get certification from the National Institute of Securities Markets (NISM) after passing the relevant examinations.In case an 'associated person' has obtained certification by passing NISM Certified Personal Financial Advisor (CPFA) examination as on the date of this notification, the person is not required to obtain such certification.