Legal Construction of Sale and Purchase of Land in Indonesia in the Perspective OfAct No. 5 of 1960 Concerning Basic Regulations on Agrarian Principles

The sale and purchase of land-based on customary law in daily practice is still practiced by somepeople in indonesia. the sale and purchase of land in customary law adhere to the principle of tunai andterang which means that the handover of rights by the seller is carried out simultaneously with paymentby the buyer and immediately the rights have transferred. this research discusses the ratio legis of theuse of the principle of tunai and terang in the sale and purchase of land in indonesia. the researchmethod used is normative legal research with a statutory approach and a conceptual approach as aproblem approach method. the results showed that the use of tunai and terang in the formation of saleand purchase agreements for land rights in indonesia is because uupa accommodates customary law asthe basis for the national land law. the existence of cash and light principles is expected to providelegal protection for sellers and buyers.