If we confirm that the contract under the invalid situation , the project costs should be divided into two circumstances : the qualified checking and accepting projects should have the project cost settlement by the contract ; and the unqualified 在合同被確認無效的情形下,工程價款的結算按竣工驗收合格與不合格兩種情況,分別適用不同的原則:竣工驗收合格的,應當參照合同約定結算工程價款;竣工驗收不合格的不予結算工程價款。