1.1 This part of ISO/IEC 29168 specifies the mechanisms and criteria to be applied for the selection and approval of the object identifier resolution system (ORS) operational agency, and includes procedures that the operational agency is required to follow. 1.2 It also addresses any future modification of the procedures, and the procedures for any change of the operational agency. 1.3 It lists the object identifier (OID) nodes for which the operational agency is required to provide ORS support. 1.4 It gives the required level of support for these nodes. 1.5 It gives the procedures by which lower-level nodes can apply for ORS support (class A, class B, or class C), and the role of the operational agency in providing these levels of support. 1.6 It determines the basis for charges that might be levied for these levels of support.