Canonum De Ius Positivum
Canons of Positive Law
VII. Law
7.6 Creation of Law
Article 279 - Rescript
Canon 3092 (link)
Canon 3093 (link)
Only three (3) types of Official Person may issue a valid Rescript, Supreme, Superior and Ordinary:
(i) A Rescript Issued by a Supreme Official Person is called an Imperium; and
(ii) A Rescript Issued by a Superior Official Person is called an Institutum; and
(iii) A Rescript Issued by a Ordinary Official Person is called an Ordinatim.