Is there a special word for this?

PROCLAMATION.

Yes, probably, good suggestion.

What it's called might depend to some extent on what the statement is about.

Decree?

If the "Queen" refers to Elizabeth II, she never had the power to issue proclamations or decrees in her own right. She merely "consents" to such statements made by the government of the day. The only "public statements" she tends to make (usually with the help of advisers) are her "Christmas Messages" etc, which tend to fulfil a "dutiful role" as head of The Commonwealth.

Thank you very much!

Speaking of the Queen of Great Britain, she will be 87 next month. At her longevity, it's a possibility Prince Charles, next in line to rule, will have the shortest reign possible. Yet, I predict if Prince Philip dies, the Queen will step down because I believe her husband furnishes the energy she needs to keep going. Evidently, QII, believes she should die on the throne.

Queen Elizabeth2 was hospitalized with what was described as a gastrointestinal problem; she has since been released after a couple of days; however, she cancelled further appointments which is highly unusual for this once robust queen. QII will be 87 on April 26. One would think it time she stepped down and allowed Prince Charles to become king before she outlives her heir.