We have been looking at how this could be achieved but it is a complex matter.

Keeping rates at such levels, however, is a complex matter.

It is a far more complex matter than I had first thought'.

That may be a simplistic view of a complex matter.

As with most complex matters, no one approach can be successful.

"Both these issues deal with very complex administrative matters," he said.

The implementation of the competition rules can indeed be a complex matter.

We all know that child labour is a complex matter.

I certainly agree that such systems are a complex matter.

In a federal state, it may be a highly complex matter.