De or het overwerkvergunning?

The correct Dutch article is:

de overwerkvergunning

Rule Words ending in -ing: almost always de. See the rule

How to use overwerkvergunning

the overwerkvergunningde overwerkvergunning
this overwerkvergunningdeze overwerkvergunning
that overwerkvergunningdie overwerkvergunning
our overwerkvergunningonze overwerkvergunning
your overwerkvergunningjouw overwerkvergunning
every overwerkvergunningelke overwerkvergunning
which overwerkvergunning?welke overwerkvergunning?
a big overwerkvergunning / the big overwerkvergunningeen grote overwerkvergunning, de grote overwerkvergunning