The US military has a "Code of Conduct"; each "point" of that code is an article:
The Code of the U.S. Fighting Force is a code of conduct that is an "ethical guide" and a United States Department of Defense directive consisting of six articles to members of the United States Armed Forces, addressing how they should act in combat when they must "evade capture, resist while a prisoner or escape from the enemy." (Wikipedia)
(Although Wikipedia doesn't offer an easy reference to prove "article" is valid, I can confirm from personal experience that these are in fact recited as "articles of the Code of Conduct.")
Similarly, the Uniform Commercial Code is comprised of articles:
U.C.C. - ARTICLE 1 - GENERAL PROVISIONS (2001)
U.C.C. - ARTICLE 2 - SALES (2002)
U.C.C. - ARTICLE 2A - LEASES (2002)
U.C.C. - ARTICLE 3 - NEGOTIABLE INSTRUMENTS (2002)
and so forth...
(Legal Information Institute)
The National Association of Realtors has a "Code of Ethics" made up of articles as well:
Article 1: REALTORS® protect and promote their clients’ interests while treating all parties honestly.
Article 2: REALTORS® refrain from exaggeration, misrepresentation, or concealment of pertinent facts related to property or transactions.
(and so forth...)
This use of article is in keeping with the third definition of the word in Oxford Dictionaries:
A separate clause or paragraph of a legal document or agreement, typically one outlining a single rule or regulation (OxfordDictionaries)