Step 1: Define the Principle of Non-Refoulement.
This is the cornerstone of international refugee law.
It is the fundamental principle that forbids a country receiving asylum seekers from returning them to a country in which they would be in likely danger of persecution based on their race, religion, nationality, membership of a particular social group or political opinion.
Step 2: Identify the specific article in the 1951 Refugee Convention.
The principle of non-refoulement is explicitly enshrined in Article 33 of the 1951 Convention relating to the Status of Refugees.
This article is considered the most important provision of the Convention, and the principle is also recognized as a part of customary international law, binding on all states.