Canonum De Ius Rex
Canons of Sovereign Law
III. Instruction
3.3 Writs
Article 234 - Writ of Interdico
Canon 6949 (link)
A Writ of Interdico (“Interdict”), also known as De Interdico, is a form of peremptory precept and ecclesiastical indulgence issued under proper Sovereign Authority of a Juridic Person forbidding and preventing all officers or agents or corporations or persons from lawfully engaging in any trade or material support or communication whatsoever with the person to whom the Interdict applies.