ied in this clause are the syntax elements and derived upper-case variables for the current access unit. The derivation process for the set of layer representations required for decoding as specified in clause G.8.1.1 is invoked and the output is a list dqIdList of integer values specifying layer representation identifiers. The variables DQIdMin and DQIdMax are set equal to the minimum and maximum values, respectively, of the entries of the list dqIdList, and the variable DependencyIdMax is set equal to (DQIdMax >> 4). DependencyIdMax shall be the same for all access units of the coded video sequence. At the start of the decoding process for an access unit, the following applies: 1. Variables and functions relating to picture order count are derived by invoking the SVC decoding process for picture order count as specified in clause G.8.2.1 with dqIdList as the input. The SVC decoding process for gaps in frame_num as specified in clause G.8.2.5 is invoked with dqIdList as the input. 3. For each value of currDQId that is contained in the list dqIdList, the following applies: The decoding process for macroblock to slice group map as specified in clause 8.2.2 is invoked with the syntax elements of the NAL units with DQId equal to currDQId as the input. For this invocation of the process specified in clause 8.2.2, when currDQId is less than DQIdMax, "active picture parameter set" is substituted with "active layer picture parameter set". The function NextMbAddress() as specified in clause 8.2.2 is used for parsing the slice data syntax structures of all NAL units with DQId equal to currDQId and for inferring slice data and macroblock layer syntax elements for slices with slice_skip_flag equal to 1 and DQId equal to currDQId (see clause G.7.4.3.4). The collective terms currentVars and refLayerVars are initially marked as not available. The variable currDQId proceeds over the values DQIdMin.DQIdMax, and when a value of currDQId is present in the list dqIdList, the following ordered steps apply: The variable spatResChange