A method for video encoding includes determining whether a current block in a picture to be included in a coded video bitstream meets a size requirement and, in response to determining that the current block meets the size requirement, determining an intra block copy prediction mode usage flag for the current block based on a type of a tile group or slice to which the current block belongs. In response to determining that the current block meets the size requirement, the method further includes determining, based on the IBC prediction mode usage flag, an IBC prediction mode that is separate from an inter prediction mode and an intra prediction mode, determining a block vector that points to a reference area in the picture in response to the determination of the IBC prediction mode, and encoding the current block based on reference samples within the reference area in the picture.