Final answer:
Legislation governing pressure equipment includes various standards and codes by different organizations. Option 4 lists ASTM, ASME, NBIC, API, DIN, and ISO, which are relevant to the industry and provide guidelines for dealing with pressure-related devices and systems.
Step-by-step explanation:
The legislation that governs the pressure equipment discipline includes codes and standards relevant to the design, construction, inspection, and testing of pressure vessels and piping systems. The options provided list various organizations responsible for codes and standards in the industry. Of the options, Option 4 is accurate as it includes ASTM (American Society for Testing and Materials), ASME (American Society of Mechanical Engineers), NBIC (National Board Inspection Code), API (American Petroleum Institute), DIN (Deutsches Institut für Normung or German Institute for Standardization), and ISO (International Organization for Standardization). These organizations are critical as they define industry norms for dealing with pressure-related devices, materials and systems, including vital concepts like absolute pressure, atmospheric pressure, and the application of Pascal's Principle in hydraulic systems.