One of the local wisdom in Manggarai that relates to agreement or engagement is the ijon system. Basically, the ijon system is asystem of agreement or trade ia an item that arises in the community that is not clear about the goods or thre results that will be obtained. The method that is appropriate or has relationship with the material that we will discuss, namely the descriptive research method. Descriptive research method is research that aims to describe something is acertain area and at a certain time. Usually in this reseach the research already gets or already has a picture in the form of initial data about the problem to be studied. Buying and selling coffee with a bond system is not made in writing but is only confirmed by the buyer’s deposit receipt. In the practice of the coffee bond system in Colol village, two parties are involved, namely: 1. Coffee Farmers 2. Ijon Buyers/Middlemen to solve any problems related to the bond system in their Village, can use several alternatives and step taken by Colol villagers if a problem occur, namely: 1. Done in a family way 2. Done at the village office 3. Done in court.
 

Development the law of obligations and guarantees is related to local wisdom through the applications of norms related to vocal values and traditions. The development of engagement and guarantee concepts can reflect aspects of local wisdom, such as social values, culture or custom recognized in a particular community. By using normative research methods that focus on research that uses legal sources, statutory regulations and legal documents relating to wisdom in resolving land problems in the Ngadhu-Bhaga Community In Ngada Regency. Local wisdom of the Ngadhu-Bhaga Community In Ngada Regency, East Nusa Tenggara, land isssues are an important matter and are closely related to everyday life. In resolving land issues, the Ngadhu-Bhaga Community has methods in accordance with customs and cultural heritage that have been known for a long time.

Reflecting aspects of local wisdom, such as social values, culture or customs recognized by the local Tana Toraja community. Toraja is an area that has many very unique cultural traditions. One of them is the mantunu tedong ritual, which can be said to be one of the rituals that native Toraja people are certainly proud of. By using normative research methods that focus on research that uses legal sources, statutory regulations, local regional regulations, and legal theory and legal documents relating to wisdom in completing the Matunu Tedong agreement which occurred during the Rambu Solo event in Tana Toraja, South Sulawesi regarding the agreement in the Matunu Tedong event which is one of a series of customs in the Rambu Solo event. In completing this agreement, the Tana Toraja people have methods in accordance with customs and cultural heritage that have existed for a long time.

The law of engagement is a concept that has existed since ancient times. In the past, engagements often relied on customary law and social norms applicable in a particular society. However, with the increasing development of society and trade, there is a need to have more formal legal rules to regulate agreements and agreements. The term "engagement" refers to the equivalent of the Dutch term "Verbintenis" (Fuadi, 1999: 1). The term contract law includes all provisions in the third book of the Civil Code. The research method uses empirical methods where this method is through observations made by the public. Then it is studied through the customs of the people of Southwest Sumba, especially in kodi regarding the legal relations of engagements that occur with the traditional ritual of removing the bones of ancestors. The data was obtained from an interview with a native Kodi resident named Andreas Ikit Bani, a native descendant of Kodi who often participated in bone dissection rituals. The Galih Tulang event is a traditional ritual carried out by the people of Southwest Sumba to move the bones of their ancestors from old graves to new graves. This ritual is part of a sacred traditional ceremony and is considered important for the people of Southwest Sumba to honor the spirits of their ancestors (Andreas Ikit Bani, 2023). This event has a meaning and purpose that we must know, namely Galing Tulang is a ceremony that must be held to honor our deceased ancestors. The aim is to pay respects to the spirits of deceased ancestors, ask for blessings, and/or give them their proper place in the afterlife.

Transportation according to Purwosutjipto is a reciprocal agreement between the carrier and the sender, in which the carrier binds himself to handle the safe transportation of goods and/or people from one place to a certain destination, while the sender binds himself to pay the freight. Meanwhile, the definition of carrier's responsibility is the obligation of the air transport company to compensate for losses suffered by passengers and/or freight forwarders as well as third parties. Responsibility can be known from the obligations that have been stipulated in the agreement or law. The obligation of transportation is to organize the transportationThis study aims to examine the legal relationship between airlines and passengers, as well as to determine the company's responsibility to passengers in the event of damage to goods. The method used in this research is normative method. The results of the study show that the legal relationship between the Air Transport Company and the passengers is a legal relationship which is a periodic agreement, namely an agreement with conditions that are carried out only for a certain time and for a certain action. Airline companies must be ready to be responsible to consumers who use air transportation services in accordance with applicable laws and regulations, namely Law Number 1 of 2009 concerning Aviation and regulated more specifically in Ministerial Regulation Number 77 of 2011 concerning Air Transport Responsibilities.