Declaration Forms Obsolescence: Forms C, E I and F declared invalid immediately; listed declarations withdrawn publicly. Notification by the Commissioner (VAT) declares Declaration Forms 'C', 'E I' and 'F' to be obsolete and invalid for all purposes with immediate effect under sub rule (13) of rule 5 of the CST (Delhi) Rules, 2005. The notification lists affected form numbers together with the corresponding taxpayer identification, party particulars and the tax period or month to which each declaration related, thereby withdrawing those instruments from use and acceptance in VAT/CST transactions.