The scope of supply for spare parts, special tools and consumable materials shall be specified in the SS document. The supplier shall be requested to provide all spare parts, special tools and consumables required for the installation, testing, commissioning and operation of the systems and equipment included in his scope of supply until final plant takeover by the owner. The bidder shall provide with his bid a list of recommended spare parts and special tools for the period extending up to takeover. Should additional spare parts or special tools that were not included in this list be required, for any reason, before plant takeover, they shall be furnished by the supplier at no extra cost.

The supplier shall also be requested to include in his bid another list of spare parts and special tools (indicating unit prices, quantity and delivery times) that will reasonably be necessary to ensure a number of years of normal plant operation (e. g. 3, 5 or 10 years). The owner may decide to request the submittal of separate lists, one for each specific period, to facili­tate the evaluation and decision-making process.

The bidder shall also guarantee the availability and delivery of the spare parts for a reasonable number of years; in the event of a particular spare part or special tool becoming unavailable before the end of this period (e. g. production has been discontinued or the manufacturer has gone out of business), the owner should have the right to use all drawings and specifica­tions relating to this item to procure it on the market.