<h1>Service charge voluntary: customers decide on payment; mandatory levies may be complained of under consumer law.</h1> Service charge is voluntary and must be left to the discretion of the customer; bills should show a blank service charge column for customers to complete. Consumers subjected to mandatory levies may file complaints under consumer law. The ministry currently lacks power for stringent fines, but a proposed Consumer Protection Bill would establish an authority with enforcement powers. The guidelines will be sent to states for action.