Enforcement Rules of the Government Procurement Act Article 49
For a tender opening under open or selective tendering procedures, the tender documentation may leave the time and place of tender opening unspecified in any one of the following circumstances:1. where it is a qualification review for establishing a permanent list of qualified suppliers under selective tendering procedures pursuant to Article 21 of the Act;2. where it is a multi-step opening of tenders pursuant to Article 42 of the Act, and the time and place of tender opening of the subsequent step are uncertain;3. where the procedures and contents of tender opening shall be kept confidential pursuant to subparagraph 1 of Article 57 of the Act;4. where a procurement is conducted pursuant to subparagraph 2 of paragraph 1 of Article 104 of the Act; and5. other circumstances as prescribed by the responsible entity.Under the circumstance of subparagraph 2 of the preceding paragraph, the entity shall notify eligible tenderers of a prior step of the time and place of tender opening in the subsequent step.Article 49-1The date of tender opening specified in the tender documentation for open tendering, selective tendering and price competition under limited tendering procedures shall be the expiry date of the time-limit or the business day following that date. This provision does not apply to the tender opening in the second or the subsequent steps provided that it is a multi-step opening of tenders.