Article 120 provides the legal enabling authority for Oman to enter into international tax treaties. It permits the Sultanate to conclude bilateral or multilateral agreements and to accede to existing international conventions concerning tax matters. This is the foundation for Oman's extensive network of Double Taxation Avoidance Agreements (DTAAs). By authorizing such agreements, the Law ensures that treaty provisions—which often provide lower tax rates or specific relief mechanisms—can be legally integrated into and prioritized within the domestic tax framework to facilitate cross-border investment.