De or het basisverordening?

The correct Dutch article is:

de basisverordening

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

How to use basisverordening

the basisverordeningde basisverordening
this basisverordeningdeze basisverordening
that basisverordeningdie basisverordening
our basisverordeningonze basisverordening
your basisverordeningjouw basisverordening
every basisverordeningelke basisverordening
which basisverordening?welke basisverordening?
a big basisverordening / the big basisverordeningeen grote basisverordening, de grote basisverordening