Final answer:
The 'White Diamond' is the publication that houses the constitution, supreme laws, and subordinate rituals of the Pi Kappa Phi fraternity.
Step-by-step explanation:
The publication that contains the constitution, supreme laws, and subordinate rituals of Pi Kappa Phi fraternity is known as the 'White Diamond'.
The White Diamond serves as the fraternity's official guide, detailing the organization’s foundational documents and ceremony scripts. The publication is used by members to maintain the integrity of the fraternity's traditions and operations, ensuring that all chapters adhere to a standardized set of rules and rituals.