Immunity from penalties: paying declared tax secures protection from penalties, specified interest and prosecution under the Scheme. Payment of declared tax dues under the Scheme grants immunity from penalty, interest (except specified exceptions), prosecution and other proceedings under the applicable sales, works contract and entry tax laws for the declared period and amounts. The Scheme defines 'declarant' to include certain contractor contractee relationships and provides reciprocal immunity to avoid double taxation. Declarations become conclusive on issuance of discharge acknowledgement and cannot be reopened; pending quasi judicial appeals up to the Tribunal are deemed withdrawn and higher court matters must be withdrawn by the declarant. Declarations are confidential and a protective period applies after registration if intent to opt is declared.