f the temporal level zero dependency representation index SEI message is not included in a scalable nesting SEI message, setOfDId consists of exactly one value, which is equal to 0. Otherwise (the temporal level zero dependency representation index SEI message is included in a scalable nesting SEI message), setOfDId consists of the values sei_dependency_id[i] for all i in the range of 0 to hum_layer_representations_minus1, inclusive, that are present in the scalable nesting SEI message associated with the temporal level zero dependency representation index SEI message. For the scalable nesting SEI message that contains the temporal level zero dependency representation index SEI message, Il_layer_representations_in_au_flag shall be equal to 1 or the value of sei _quality_id i shall be equal to 0 for all values of i in the range of 0 to num_layer_representations_minus1, inclusive. All dependency representations that are referred to in the following specification inside this clause are dependency representations of a primary coded picture. Unless specified otherwise, all dependency representation that are referred to in the following are dependency representations of the primary coded picture of the access unit that is associated with the temporal level zero dependency representation index SEI message. The dependency representations of the access unit that have dependency_io equal to any value of the set setOfDId are also referred to as associated dependency representations. For each value of dId in the set setOfDId, the access unit may or may not contain a dependency representation with dependency_id equal to dId. t10_dep_rep_idx indicates the temporal level zero index for the associated dependency representations, if temporal is equal to 0. Otherwise (temporal_io is greater than 0), t10_dep_rep_idx indicates the temporal level zero index of the dependency representations of the most recent access unit with temporal_id equal to 0 in decoding order that have the same value of dependency_id as any of the associated d