published in the appropriate publication listed in Appendix II.2. The invitation to participate may take the form af a notice of proposed procurement, as provided for in paragraph 6.3. Entities in Annexes 2 and 3 may use a notice of planned procurement, as provided for in paragraph 7, or a notice regarding a qualification system, as provided for in paragraph 9, as an invitation to participate.4. Entities which use a notice of planned procurement as an invitation to participate shall subsequently invite all suppliers who have expressed an interest to confirm their interest on the basis of information which shall include at least the information referred to in paragraph 6.5. Entities which use a notice regarding a qualification system as an invitation to participate shall provide, subject to the considerations referred to in paragraph 4 of Article XVIII and in a timely manner, information which allows all those who have expressed an interest to have a meaningful opportunity to assess their interest in participating in the procurement. This information shall include the information contained in the notices referred to in paragraphs 6 and 8, to the extent such information is available. Information provided to one interested supplier shall be provided in a non-discriminatory manner to the other interested suppliers.6. Each notice of proposed procurement, referred to in paragraph 2, shall contain the following information:(a) the nature and quantity, including any options for further procurement and, if possible, an estimate of the timing when such options may be exercised; in the case of recurring contracts the nature and quantity and, if possible, an estimate of the timing of the subsequent tender notices for the products or services to be procured;(b) whether the procedure is open or selective or will involve negotiation;(c) any date for starting delivery or completion of delivery of goods or services;(d) the address and final date for submitting an application to be invited to tender or for qualifying for the suppliers' lists, or for receiving tenders, as well as the language or languages in which they must be submitted;(e) the address of the entity awarding the contract and providing any information necessary for obtaining specifications and other documents;(f) any economic and technical requirements, financial guarantees and information required from suppliers;(g) the amount and terms of payment of any sum payable for the tender documentation; and(h) whether the entity is inviting offers for purchase, lease, rental or hire purchase, or more than one of these methods.7. Each notice of planned procurement referred to in paragraph 3 shall contain as much of the information referred to in paragraph 6 as is available. It shall in any case include the information referred to in paragraph 8 and;(a) a statement that interested suppliers should express their interest in the procurement to the entity;(b) a contact point with the entity from which further information may be obtained.8. For each case of intended procurement, the entity shall publish a summary notice in one of the official languages of the WTO. The notice shall contain at least the following information:(a) the subject matter of the contract;(b) the time-limits set for the submission of tenders or an application to be invited to tender; and(c) the addresses from wihich documents relating to the contracts may be requested.9. In the case of selective tendering procedures, entities maintaining permanent lists of qualified suppliers shall publish annually in one of the publications listed in Appendix III a notice of the following:(a) the enumeration of the lists maintained, including their headings, in relation to the products or services or categories of products or services to be procured through the lists;(b) the conditions to be fulfilled by suppliers with a view to their inscpription on those lists and the methods according to which each of those conditions will be verified by the entity concerned; and(c) the period of validity of the lists, and the formalities for their renewal.When such a notice is used as an invitation to participate in accordance with paragraph 3, the notice shall, in addition, include the following information:(d) the nature of the products or services concerned;(e) a statement that the notice constitutes an invitation to participate.However, when the duration of the qualification system is three years or less, and if the duration of the system is made clear in the notice and it is also made clear that further notices will not be published, it shall be sufficient to publish the notice once only, at the beginning of the system. Such a system shall not be used in a manner which circumvents the provisions of this Agreement.10. If, after publication of an invitation to participate in any case of intended procurement, but before the time set for opening or receipt of tenders as specified in the notices or the tender documentation, it becomes necessary to amend or re-issue the notice, the amendment or the re-issued notice shall be given the same circulation as the original documents upon which the amendment is based. Any significant information given to one supplier with respect to a particular intended procurement shall be given simultaneously to all other suppliers concerned in adequate time