Deterioration of stock cover is a follow-up cover to Machinery Breakdown Insurance and may only be taken out in connection with the latter. The Insurance covers deterioration of goods stored in cold storage, which might arise due to a breakdown of refrigerating machinery. The Policy includes deterioration damage due to refrigerants escaping or leaking as a consequence of an indemnifiable machinery breakdown, a rise or fall in cooling temperature or directly resulting from any indemnifiable material damage to the refrigeration plant. In the Indian Market it is customary to have two different forms of policies: (i) Deterioration of Stocks Insurance (Other than potatoes): This policy is for stock of fish, prawns, frog legs and other types of sea foods, fruits, cheese, provisions and other dairy and agricultural products etc. (ii) Deterioration of Stock Insurance (Potatoes): This policy is exclusively meant for the contents of potato cold storage. The policies follows a Machinery Insurance Policy and it is a condition precedent under DOS policy that a claim would be admitted under the Machinery Policy.