This document discusses good manufacturing practices related to sanitation, prevention of cross-contamination and mix-ups, and processing of intermediates. It emphasizes that premises must be designed and maintained for good sanitation. Strict procedures and controls are needed to prevent cross-contamination between products during production through measures like segregation, air handling, cleaning, and labeling. Intermediates must also be stored and handled carefully according to specifications. Thorough cleaning and changeover procedures are required when switching between products to avoid mix-ups.