 marked as "used for long-term reference" with LongTermPicNum equal to 0 and 3, the initial index order is: RefPicList0[0] is set equal to the short-term reference picture with PicNum = 303, RefPicList0[1] is set equal to the short-term reference picture with PicNum = 302, RefPicList0[2] is set equal to the short-term reference picture with PicNum = 300, RefPicList0[3] is set equal to the long-term reference picture with LongTermPicNum = 0, RefPicList0[4] is set equal to the long-term reference picture with LongTermPicNum = 3. 8.2.4.2.2 Initialisation process for the reference picture list for P and SP slices in fields This initialisation process is invoked when decoding a P or SP slice in a coded field. When this process is invoked, there shall be at least one reference field (which can be a field of a reference frame) that is currently marked as "used for reference" (i.e., as "used for short-term reference" or "used for long-term reference") and is not marked as "non-existing". Each field included in the reference picture list RefPicList0 has a separate index in the reference picture list RefPicList0. NOTE - When decoding a field, there are effectively at least twice as many pictures available for referencing as there would be when decoding a frame at the same position in decoding order. Two ordered lists of reference frames, refFrameList0ShortTerm and refFrameList0LongTerm, are derived as follows. For purposes of the formation of this list of frames, decoded reference frames, complementary reference field pairs, non-paired reference fields and reference frames in which a single field is marked "used for short-term reference" or "used for long-term reference" are all considered reference frames. All frames having one or more fields marked "used for short-term reference" are included in the list of short-term reference frames refFrameList0ShortTerm. When the current field is the second field (in decoding order) of a complementary reference field pair and the first field is marked as "used for short-term referenc