The present Regulation applies to the production and distribution of medicated feed for fish, crustaceans, and molluscs. Those who manufacture or import medicated feed for fish, crustaceans, and molluscs require permission from the Icelandic Medicines Agency to operate. Distribution includes all forms of importation, exportation, inventory management, sales, delivery, and other activities related to the distribution of medicated feed. Medicated feed may only be distributed if it is produced from a premix for medicated feed that has a marketing authorization in Iceland or from a premix for medicated feed that has been authorized under paragraph 7 of Article 7 of the Medicines Act (No. 93/1994). Manufacturers of medicated feed must carry out regular quality control of their production, including making appropriate laboratory measurements of the homogeneity of the medicated feed. Medicated feed may only be delivered against a veterinarian's prescription for medicated feed.