A CODE is a body of laws arranged systematically for easy reference and use. Because
a code has a legal status, it is by definition mandatory, and uses words such as shall, will,
and must to express certain conditions and requirements, and to verify that those require-
ments are being met. Examples of codes include AWS D1.1, Structural Welding Code-
Steel, AASHTO/AWS D1.5, Bridge Welding Code, and ASME B31.1, Power Piping
Code.