法律行為之方式涉及該行為之成立與否，究應適用何國法律為其準據法，對於當事人權益影響重大，新法雖已針對舊法不足之處，在架構及內容上進行了部分修正，但仍有部分不足有待進一步探討。例如，在系爭法律行為之「成立」準據法與「效力」準據法不同時，究應以何者作為該行為之準據法，不無疑義；再者，於行為地的確定方面，新法雖增訂了有關隔地契約之行為方式準據法，但對位於不同法域之人所為之「單獨行為」，究應以何處作為其行為地則未有明確規範；又如消費者契約等當事人締約地位不平等之契約，站在弱者保護的觀點上，就此類契約方式之準據法，是否應有特殊考量及規範，亦有加以檢討之必要。本文擬藉由此次涉外民事法律適用法之修訂，就有關涉外法律行為方式之準據法加以探討，希望能提供將來學界論述或實務適用上些許之助益。

The formalities for juridical act will involve in whether the legal act is constituted or not and which country's law shall be the governing law in this regard, which will significantly affect the party's right. While some shortages have been supplemented by the new act, there are still some insufficient parts which still need to be further discussed. Take for example, if there is a discrepancy of governing laws between the formation and the effectiveness of the act, which law shall be the governing law is still arguable. In addition, the new act is silent on the location of the act to decide the governing law for the unilateral act conducted by each party in the different territory. Finally, it is necessary for further discussion on whether there are other considerations and regulations for the consumer contract due to the unfair position in nature for the execution of the contract. This article hopes to provide the fields of the scholarship and legal system with some helps in the issues in question.