De or het jubileumcommissie?

The correct Dutch article is:

de jubileumcommissie

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

How to use jubileumcommissie

the jubileumcommissiede jubileumcommissie
this jubileumcommissiedeze jubileumcommissie
that jubileumcommissiedie jubileumcommissie
our jubileumcommissieonze jubileumcommissie
your jubileumcommissiejouw jubileumcommissie
every jubileumcommissieelke jubileumcommissie
which jubileumcommissie?welke jubileumcommissie?
a big jubileumcommissie / the big jubileumcommissieeen grote jubileumcommissie, de grote jubileumcommissie