In parliamentary procedure

Parliamentary procedure

Parliamentary procedure is the body of rules, ethics, and customs governing meetings and other operations of clubs, organizations, legislative bodies, and other deliberative assemblies...

, a friendly amendment is an amendment

Bill (proposed law)

A bill is a proposed law under consideration by a legislature. A bill does not become law until it is passed by the legislature and, in most cases, approved by the executive. Once a bill has been enacted into law, it is called an act or a statute....

 to a motion under debate that is perceived by all parties as an enhancement to the original motion, often only as clarification of intent.

Explanation

Friendly amendments are often allowed by the chair after consent by the original mover of the motion. However, strictly speaking, a friendly amendment should not be handled any differently from a regular amendment: the entire assembly

Deliberative assembly

A deliberative assembly is an organization comprising members who use parliamentary procedure to make decisions. In a speech to the electorate at Bristol in 1774, Edmund Burke described the English Parliament as a "deliberative assembly," and the expression became the basic term for a body of...

must consent to the amendment.