n present, inter-view only reference components, are addressed through reference indices as specified in clause 8.2.4.1. A reference index is an index into a reference picture list. When decoding a P or SP slice, there is a single reference picture list RefPicList0. When decoding a B slice, there is a second independent reference picture list RefPicList1 in addition to RefPicListO. At the beginning of the decoding process for each slice, reference picture list RefPicList0, and for B slices RefPicListl, are derived as specified by the following ordered steps: 1. Depending on non_idr_flag, the following applies: If non_idr_flag is equal to 1, the initial reference picture list RefPicList0 and for B slices RefPicList1 are derived as specified in clause 8.2.4.2. Otherwise (non_idr_flag is equal to 0), all (num_ref_idx_10_active_minus1 + entries of the initial reference picture list RefPicList0 are set equal to "no reference picture" and, for B slices, all (num_ref_idx_l1_active_minus1 + 1) entries of the initial reference picture list RefPicList1 are set equal to "no reference picture". 2. Inter-view reference components or inter-view only reference components are appended to the initial reference picture list RefPicList0 and for B slices RefPicList1 as specified in clause H.8.2.1. When ref_pic_list_modification_flag_10 is equal to 1 or, when decoding a B slice, ref_pic_list_modification_flag_l1 is equal to 1, the reference picture list RefPicList0 and for B slices RefPicList1 are modified as specified in clause H.8.2.2. NOTE - The modification process for reference picture lists specified in clause H.8.2.2 allows the contents of RefPicList0 and for B slices RefPicList1 to be modified in a flexible fashion. In particular, it is possible for a reference picture that is currently marked "used for reference" to be inserted into RefPicList0 and for B slices RefPicList1 even when the reference picture is not in the initial reference picture list derived as specified in clauses 8.2.4.2 and H.8.2.1. The number of entries in