JVET-R0066: Signal ols_dpb_chroma_format[ i ] and ols_dpb_bitdepth_minus8[ i ] in the VPS,...

1. Signal the maximum values of chroma_format_idc and bit_depth_minus8 for all pictures of all layers in the VPS
2. When sps_video_parameter_set_id is greater than 0, it is required that, for any OLS with OLS index i that contains one or more layers that refers to the SPS, the value of chroma_format_idc shall be less than or equal to the value of ols_dpb_chroma_format[ i ], and the value of bit_depth_minus8 shall be less than or equal to the value of ols_dpb_bitdepth_minus8[ i ].
3. The value of no_output_of_prior_pics_flag, when present, is required to be the same for all pictures in an AU