The US Constitution outlines each branch of government and their responsibilities. Article 1 is the portion of the Constitution that establishes the legislative department.
preamble
An individual portion of stock is referred to as a share.
preamble dumby
article 5
Article I of the US Constitution establishes the legislative branch.
Only 62% per wikipedia
The Preamble
20th amendment
The oath of office and similar things? No, there is no such portion.
The preamble
The Preamble