De or het tariefcommissie?

The correct Dutch article is:

de tariefcommissie

Rule Words ending in -tie and -sie: almost always de. See the rule

How to use tariefcommissie

the tariefcommissiede tariefcommissie
this tariefcommissiedeze tariefcommissie
that tariefcommissiedie tariefcommissie
our tariefcommissieonze tariefcommissie
your tariefcommissiejouw tariefcommissie
every tariefcommissieelke tariefcommissie
which tariefcommissie?welke tariefcommissie?
a big tariefcommissie / the big tariefcommissieeen grote tariefcommissie, de grote tariefcommissie