A video coding mechanism is disclosed. The mechanism includes receiving a bitstream including a first slice of a coded image. The coded image is associated with a picture parameter set (PPS) in the bitstream. The first slice is associated with a slice header in the bitstream. A list of identifiers (IDs) is parsed from the PPS. A first ID is parsed from the slice header of the first slice. The first ID matches one of the IDs in the list of IDs in the PPS. A list of tiles coded in the first slice is determined based on the first ID. The first slice is determined to generate a reconstructed sub-image of the coded image.