Registration is valid for a period of four years. However, extension for a period not exceeding two years may be granted in special cases provided such extension is applied for within 3 months of the date of expiry of the “Four – Years Registration Period”. The extension is effective from the date of expiry of the registration.

The extension is subject to the payment of Re-validation Fee @Rs 1600/- per year and fulfillment of such other conditions as may prescribed by the ISTD Diploma Board in this respect.