De or het streekplanherziening?

The correct Dutch article is:

de streekplanherziening

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

How to use streekplanherziening

the streekplanherzieningde streekplanherziening
this streekplanherzieningdeze streekplanherziening
that streekplanherzieningdie streekplanherziening
our streekplanherzieningonze streekplanherziening
your streekplanherzieningjouw streekplanherziening
every streekplanherzieningelke streekplanherziening
which streekplanherziening?welke streekplanherziening?
a big streekplanherziening / the big streekplanherzieningeen grote streekplanherziening, de grote streekplanherziening