authoritative

The government says the proposed new digital ID - which will cost the user nothing - "will be the authoritative proof of who someone is and their residency status in this country".

Sir Menzies Campbell, latterly Lord Campbell of Pittenweem but usually known as Ming, was one of Westminster's most distinctive and authoritative voices.

The critical gesture of removal at once recognized the authoritative potency of the father, while insisting that the son was necessarily charged with representing a changed world.

Ultimately fit to bat, he came to the crease at a time when England had failed to make the authoritative start they would have sought in their reply.

But as I reported for Salon previously, there is no authoritative baby-sleep-consultant board to certify that coaches are properly trained and licensed.