valid.valid_int = where & WH_INTERIOR;
    valid.valid_outer = where & WH_BOUNDARY;
    valid.valid_ghosts = where & WH_GHOSTS;

    valid.valid_int = where & CCTK_VALID_INTERIOR;
    valid.valid_outer = where & CCTK_VALID_BOUNDARY;
    valid.valid_ghosts = where & CCTK_VALID_GHOSTS;