/usr/share/eccodes/definitions/mars/grib.enfh.cf.def is in libeccodes-data 2.6.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | #assert(local=4)
alias mars.hdate = dataDate;
alias mars.date = referenceDate;
|