/usr/share/eccodes/definitions/grib3/local/ is in libeccodes-data 2.6.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/eccodes/definitions/grib3/local/1098/
/usr/share/eccodes/definitions/grib3/local/1098/2.1.table
/usr/share/eccodes/definitions/grib3/local/1098/centres.table
/usr/share/eccodes/definitions/grib3/local/1098/models.table
/usr/share/eccodes/definitions/grib3/local/1098/template.2.0.def
/usr/share/eccodes/definitions/grib3/local/2.0.table
/usr/share/eccodes/definitions/grib3/local/edzw/
/usr/share/eccodes/definitions/grib3/local/edzw/2.0.3.table
/usr/share/eccodes/definitions/grib3/local/edzw/3.table
/usr/share/eccodes/definitions/grib3/local/edzw/5.table
/usr/share/eccodes/definitions/grib3/local/edzw/generatingProcessIdentifier.table
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/cfName.def
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/cfVarName.def
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/name.def
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/paramId.def
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/shortName.def
/usr/share/eccodes/definitions/grib3/localConcepts/ecmf/units.def