Amounts deposited during customs investigation under protest...

Amounts deposited during customs investigation under protest retain their character as investigation deposits when the related duty demand is annulled, despite later appropriation. They are distinct from statutory appellate deposits under Section 129E; consequently, Section 129EE's notified 6% interest rate does not govern them. Where no statutory rate applies, entitlement to restitutionary interest depends on applicable binding judicial precedent. Jurisdictional precedent supported 12% interest on the refundable investigation deposit, while confining the 6% rate to amounts actually deposited under Section 129E. Section 27's protest exception and Section 27A's delayed-refund framework require separate assessment according to the payment's legal character.