ສັນຍາທີ່ຝ່າຍໜຶ່ງໃຫ້ສິດພຽງຝ່າຍດຽວຕໍ່ກັບໜ້າທີ່ຂອງທຸລະກິດໃດໜຶ່ງ.

contract term in which one party grants another party sole rights with regard to a particular business function.