EMA has published the final version of the Guideline which sets the exposure limits of products manufactured in so-called shared facilities (multipurpose). In other words, the question is how much from a product can be carried over in another one (cross contamination) without posing any risk to patient health.
How to calculate PDE (Permitted Daily Exposure), what is limit for genotoxic residues, when is deadline for implementation and more find in guideline: