De or het normhandhaving?

The correct Dutch article is:

de normhandhaving

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

How to use normhandhaving

the normhandhavingde normhandhaving
this normhandhavingdeze normhandhaving
that normhandhavingdie normhandhaving
our normhandhavingonze normhandhaving
your normhandhavingjouw normhandhaving
every normhandhavingelke normhandhaving
which normhandhaving?welke normhandhaving?
a big normhandhaving / the big normhandhavingeen grote normhandhaving, de grote normhandhaving