論撤銷決標對於政府採購契約效力之影響

On Influence of Withdrawal of Bid Award on Validity of Government Procurement Contract

政府採購行為態樣以一個基礎事實中有公法上（決標與否）及私法上（採購契約之成立、生效及履行）等複數法律關係存在，因應此種特殊之法律行為模式，有雙階理論之提出，並於實務中加以援引；因此，採購行為性質被雙階理論劃分成公法與私法兩個階段，並衍生出前階段決標被撤銷後對後階段契約效力影響之問題。本文藉由法規、學理、實務及機關函釋見解之彙整，說明「決標」之性質、效力及其與採購契約間之關係，並以此為基礎，討論撤銷決標之法律效果及雙階理論所形成之公私法交錯之法律關係中撤銷決標對於採購契約之影響。

With the essence of the government procurement act hinges on a rudimentary fact built upon a compound legal relations in public law (whether it concerns a bid award) and private law (the procurement contract’s sustaining, validation and execution), there is a two-phase theory being presented on such type of unique legal conduct mode, and is therefore cited for how they also coexist in practical implementation; consequently, the procurement act, by nature, is being divided by the two-phase theory into the two stages of the public law and the private law, and also presents the issue of how an bid award in the previous stage being withdrawn affects the latter stage’s contract validity. The thesis aims to describe the nature, validity of “bid award” and its correlation to a procurement contact by sorting the laws/regulations, academic theories, practical implementation, and agency interpretation letters, and also utilize the finding as a basis to discuss the legal ramifications of a withdrawn bid award, and how a withdrawn bid award affects the procurement contract under the legal relation intertwined with public law and private law formed by two-phase theory.