Blacks Law Dictionary, Fourth Edition, p. 1359
PRIVATE LAW. As used in contradistinction to public law, the term means all that part of the law which is administered between citizen and ctizen, or which is concerned with the definition, regulation, and enforcement of rights in cases where both the person in whom the right inheres
and the person upon whom the obligation is incident are private individuals. See Public Law.
[Blacks Law Dictionary, Fourth Edition, p. 1359]
Private law (particular law)
Another example of statutes that are not typically codified is a "private law" that may originate as a private bill, a law affecting only one person or a small group of persons. An example was divorce in Canada prior to the passage of the Divorce Act of 1968. It was possible to obtain a legislative divorce in Canada by application to the Canadian Senate, which reviewed and investigated petitions for divorce, which would then be voted upon by the Senate and subsequently made into law. In the United Kingdom Parliament, private bills were used in the nineteenth century to create corporations, grant monopolies and give individuals attention to be more fully considered by the parliament. The government may also seek to have a bill introduced unofficially by a backbencher so as not to create a public scandal; such bills may also be introduced by the loyal opposition — members of the opposition party or parties. Sometimes a private member's bill may also have private bill aspects, in such case the proposed legislation is called a hybrid bill.
In Canon Law, private law is called "particular law."[2]
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2. Canon 13 §1, 1983 CIC
[Wikipedia: "statutory law", Downloaded 2/14/2017]