Add a new bullet point to the list in rule “Ingredients”:

- Rat Poison

Add these two bullet points to the list of additional properties in rule “Taste Buds”:

- Poisonous
- Antidote

Add to rule “Recipes”:

A Recipe has Additional Property Poisonous if it contains at least one Ingredient with Additional Property Poisonous, and no Ingredient with Additional Property Antidote.

Add to rule “Supply Chain”, if it exists:

The Restaurant Manager has never generated any Correspondences for Poison. If the Restaurant Manager has already determined Package-Ingredient Correspondences, they may and should create a correspondence between Poison and at most two Packages of their choice that do not contain any Ingredients with Additional Property Antidote. They may and should then immediately repeal this paragraph.