If the contest is restricted to prose, the answer is "No". The reason is that the contestants are bound by the conditions put by the management according to their own policy.
If the contest is open for any kind of speech, then the form best suited to the huber contestant may be used by him or her.
The matter rests with the management. They may even change the rules if they are convinced.
In my humble view the mode in which one can best express his own inspiration merits to be allowed. poets are blessed with a faculty where the voice and the rythm join and not only the expression becomes melodious but the very words start appealing the ears and the heart. A long tale is described in two lines with an impact and impression. Great are the poets who think of the problems of the society and suggest the solution in words most polite and lasting long.
If I recollect correctly the words of Shakespeare read in some old dictionary: "My duty is not to remain silent when your excellency has wronged..." still ring in my ears like as fresh as ever to remind of the responsibility and not to become a flatterer.
May God bless all.