This Recommendation | International Standard: a) specifies a tree structure for allocations made by a hierarchical structure of Registration Authorities, called the international OID tree, which supports the ASN.1 OBJECT IDENTIFIER type and the ASN.1 OID-IRI type (see Rec. ITU-T X.680 | ISO/IEC 8824-1); b) registers top-level arcs of the international object identifier tree; c) specifies procedures which are generally applicable to registration at any level of the international OID tree; d) provides guidelines for the establishment and operation of International Registration Authorities for use, when needed, by other ITU-T Recommendations and/or International Standards; e) provides guidelines for additional ITU-T Recommendations and/or International Standards which choose to reference the procedures in this Recommendation | International Standard; f) provides a recommended fee structure for lower-level Registration Authorities. NOTE – Information about registration for specific objects is contained in separate ITU-T Recommendations and/or International Standards. This Recommendation | International Standard applies to registration by ITU-T Recommendations and/or International Standards, by International Registration Authorities (see clause 8), and by any other Registration Authority.