nstraints in clause G.10. G.7.4.2.1.1.1 Scaling list semantics The semantics specified in clause 7.4.2.1.1.1 apply. G.7.4.2.1.2 Sequence parameter set extension RBSP semantics The semantics specified in clause 7.4.2.1.2 apply. Additionally, the following applies. Sequence parameter set extension RBSPs can only follow sequence parameter set RBSPs in decoding order. Subset sequence parameter set RBSPs shall not be followed by a sequence parameter set extension RBSP. The contents of sequence parameter set extension RBSPs only apply when the base layer, which conforms to one or more of the profiles specified in Annex A, of a coded video sequence conforming to one or more of the profiles specified in Annex G is decoded. G.7.4.2.1.3 Subset sequence parameter set RBSP semantics The semantics specified in clause 7.4.2.1.3 apply. Rec. ITU-T H.264 (01/2012) G.7.4.2.1.4 Sequence parameter set SVC extension semantics inter_layer_deblocking_filter_control_present_flag equal to 1 specifies that a set of syntax elements controlling the characteristics of the deblocking filter for inter-layer prediction is present in the slice header. control present_flag equal to 0 specifies that the set of syntax elements controlling the characteristics of the deblocking filter for inter-layer prediction is not present in the slice headers and their inferred values are in effect. extended_spatial_scalability_idc specifies the presence of syntax elements related to geometrical parameters for the resampling processes. The value of extended_spatial_scalability_ shall be in the range of 0 to 2, inclusive, and the following applies: If extended_spatial_scalability_idc is equal to 0, no geometrical parameters are present in the subset sequence parameter set and the slice headers referring to this subset sequence parameter set. Otherwise, if extended spatial scalability_i is equal to 1, geometrical parameters are present in the subset sequence parameter set, but not in the slice headers referring to this subset sequence parameter set. Otherwise (exte