The abatement order is the strongest administrative sanction available to a District. Once it is issued, violation of its terms subjects the source to a potential penalty of as much as $25,000 for each day of violation as well as to criminal sanctions. An abatement proceeding is generally initiated by the district staff against the polluter. It may also be initiated by the board of directors or the hearing board itself. In an abatement case, the District, which has the burden of proof, must prove that the source will continue to illegally pollute unless restrained by an order for abatement.