Difference between Act, Article and Section

 Act

An act is a bill which has passed through the various legislative steps required for it and which has become law also known as Statute. So, simply put, an act is the formally codified result of deliberation by a legislative body.

Example: Indian Copyright Act, 1957, Advocate Welfare Fund Act, 2001 etc. 

Article

An article is a separate and distinct part of a written instrument, such as a contract, statute, or constitution, that is often divided into sections. A written instrument, containing a series of rules and stipulations that are each designated as an article. Any fundamental law of country i.e Constitution. 

Example: United Nation Charter, Various International Convention, Indian Constitution et.c 

Difference between Common Law and Civil Law Systems

Section

A section is the distinct and numbered subdivisions in legal codes or statutes.

Example: Section 5(1) of the Insolvency Bankruptcy Code 2016 read as “Adjudicating Authority” for the purposes of this Part, means National Company Law Tribunal Constituted under Section 408 of the Companies Act, 2013. 

The basic difference between an act, an article and a section would thus be that one is the sub-division of the other.