Election period preventive vigilance: mandatory seizure reporting and district upload into the CVIGIL system for prompt action. The SOP requires Kolkata Customs Zone to implement election period preventive vigilance under CBIC Instruction No. 22/2023: nominate State, sub nodal and district nodal officers; operate a central Control Room and Response Teams; prevent diversion of liquor, cigarettes and contraband; and treat seizures that may induce voters as election seizures. Sub nodal officers must relay seizure information daily to district nodal officers, who are required to upload details into the CVIGIL application on the same day, following the prescribed district wise workflow and ECI directions.