Retail sale price valuation sets excise value as declared retail price minus allowable abatement, with confiscation for non-declaration. For notified packaged excisable goods, excise value is the declared retail sale price (RSP) as specified on the package, reduced by any abatement allowed by the Central Government; abatement may consider excise duty, sales tax and other taxes. Failure to declare, incorrect declaration, or tampering with the declared RSP renders the goods liable to confiscation and the RSP shall be ascertained in the prescribed manner and deemed the RSP for valuation. The RSP definition and rules govern multiple, altered, and area-specific declared prices.