COMMISSION OF THE PEACE

Definition

A commission of the peace is a formal written instrument issued by the Crown (in English practice) or by a state executive authority (in American practice) appointing one or more persons as justices of the peace within a designated county or jurisdiction. The commission confers on the appointees the authority to keep the peace, hear and determine minor criminal matters, bind over offenders, and perform such other judicial and administrative functions as the law assigns to justices of the peace. The document itself is the legal foundation of a justice's authority. Without a valid commission, a person who performs the functions of a justice of the peace acts without jurisdiction. The commission does not merely recognize a pre-existing office; it creates the officer's legal capacity to act. In English practice, commissions of the peace were issued under the Great Seal and addressed to named individuals in a given county. A general commission named multiple persons collectively. As the office of justice of the peace evolved from the medieval period through the nineteenth century, the commission became a regularized instrument issued periodically, with names added or removed by supplemental instruments. In American colonial and early state practice, the commission of the peace was carried over from English usage. Over time, most American jurisdictions shifted to popular election of justices of the peace, which reduced but did not eliminate the relevance of the commission form: where appointment survived, the commission remained the operative grant of authority. ---

Why It Matters in Research

This term is primarily a term of historical legal practice. Researchers encountering it in primary sources — colonial records, English court documents, early American statutes, or pleadings challenging a justice's authority — need to understand that the commission of the peace is both the instrument of appointment and the source of jurisdiction. A challenge to a justice's act in historical sources may take the form of questioning the existence or validity of the commission, not the personal qualifications of the individual. The shift in American jurisdictions from appointed justices (holding commissions) to elected justices substantially changed the practical significance of the term after the mid-nineteenth century. Sources from before roughly 1850 are more likely to use the term in its full technical sense; later sources may use it loosely to mean simply the office or roster of justices of the peace in a county. Researchers working in English legal history should note that the commission of the peace is connected to quarter sessions jurisdiction. The justices named in the commission constituted the court of quarter sessions when assembled. Understanding this link is essential for tracing jurisdiction over minor crimes and administrative county governance in English sources from the fourteenth through nineteenth centuries. Rapalje & Lawrence is the primary historical dictionary source here. American legal encyclopedias of the late nineteenth and early twentieth centuries occasionally treat the commission of the peace under the heading of justices of the peace rather than as a standalone entry, so researchers should check both headings when using period reference works. ---

Historical Dictionary Support

Rapalje & Lawrence define the commission of the peace as the commission issued by the government to certain persons in each county, authorizing them to act as justices of the peace. The definition is spare but accurate: it identifies the instrument as the source of authority, ties it to the county as the unit of jurisdiction, and treats the commission as issuing from governmental authority without specifying Crown or executive, thereby covering both English and American usage. What Rapalje & Lawrence do not address is the historical depth of the instrument. The commission of the peace in English law traces to the fourteenth century, and its form and function were substantially elaborated by statute and practice long before American legal dictionaries began codifying the term. The definition also does not address what happens when a commission lapses, is superseded, or is challenged — questions that arise frequently in historical litigation and that required resort to treatises on justices of the peace rather than dictionary definitions. The entry is consistent with the general treatment in nineteenth-century American legal reference works, which tended to treat the commission as an uncontroversial grant of authority rather than a subject of ongoing doctrinal dispute. ---

Jurisdictional Note

In English practice, the commission of the peace remained a Crown instrument throughout its history. In American states, appointment by governor's commission was the original model, but many states replaced appointment with popular election during the nineteenth century. Researchers must determine which system applied in the jurisdiction and period under examination before drawing conclusions from sources that assume one model or the other. ---

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