Service tax amendments expand enforcement and officer liability while revising scope, penalties, and transitional relief measures. The Bill redefines the scope of taxable services and aligns cross-references to new provisions with retrospective effect, narrows certain service descriptions, caps registration default penalties, creates director and officer liability, restructures criminal penalties and repeat-offence consequences, designates certain offences as cognizable with arrest and bail powers for specified revenue officers, preserves notices issued under extended limitation for normal limitation invocation, empowers tribunals to condone delay by assessees, permits temporary removal-of-difficulty orders, and provides a transitional exemption for specified notices issued before the retrospective date in relation to services by a named public provider.