On a petition by the Commonwealth or a law enforcement officer, a judge or magistrate shall issue an Emergency Substantial Risk Order (ESRO) if probable cause is found that such person poses a substantial risk of injury to themselves or others through their purchase or possession of a firearm. An ESRO remains in effect for fourteen days. After that period, the Commonwealth’s Attorney must appear before a judge to seek a substantial risk order (SRO), which may remain in place for up to 180 days. While an SRO is in effect, the individual subject to the order is prohibited from purchasing, possessing, or transporting a firearm. The petition can be filed and an order obtained without the participation of the respondent – meaning, the ESRO can be sought and issued without the person who is the subject of it knowing about it in advance.