Extension of SEZ approval validity requires application with developer declaration and Development Commissioner recommendation before expiry. Form C2 requires a developer seeking extension of an SEZ in principle approval under rule 6(2)(b) to provide identification, Letter of Approval details, SEZ type and sector, expiry and requested extension dates, whether the application was filed before expiry, whether it is a first or second extension, total and acquired land area, estimated time to acquire remaining land, and reasons for extension. The applicant must declare correctness of statements and accept potential cancellation if statements are false; the form requires Development Commissioner recommendation and applicant contact and signature details.