A more thorough explanation:

A general principle of law is a widely recognized principle that applies to legal systems at a certain level of sophistication. It can also give rise to international legal obligations. This principle is recognized in all kinds of legal relations, regardless of the legal system to which it belongs.

• The principle of non-intervention is a general principle of international law that prohibits states from interfering in the internal affairs of other states.
• The principle of due process is a general principle of law that requires fair treatment in legal proceedings.

These examples illustrate how general principles of law apply to different legal systems and have universal application.

The General Services Administration (GSA) is an independent federal agency that manages government property and records, constructs and operates buildings, procures and distributes supplies, and provides management services in communications, traffic, and automatic data processing. Its Office of Enterprise Development assists small businesses in dealing with the agency through GSA's 12 regional offices.