The phrase "are either dictated" is correct and usable in written English.
It can be used when discussing options or conditions that are determined or specified by someone or something.
Example: "The rules of the game are either dictated by the referee or agreed upon by the players."
Alternatives: "are either determined" or "are either specified".
I read page after page of Johnson's poems, most of which were either dictated over the phone or sent as gifts to his family and friends.
K can be either dictated by an ad hoc scientific hypothesis, or computed on the fly, as explained below.
Most Europeans, at least the ones working, paying taxes, and suffering under the EU's regulatory dictates, are either indifferent or strongly opposed to further continental centralization.
"Manchester is small enough that all of the cultural leaders in the city can get together for a breakfast meeting and say: 'what are we going to do to make things better here?'" That wouldn't be possible in London, she says, where size dictates that projects are either "done sector by sector or little area by little area".
It is not enough to adopt one model or the other to support youth citizenship; instead, it is key to develop a model where youth efforts are facilitated rather than either dictated or ignored.
A carefully nuanced drama that unfolds with the menace of a genre thriller, "Luce" asks: What becomes of someone trying to find their own autonomous identity when society dictates they be either saint or monster, and allows for nothing in between?
"With a Sofitel, their standards would dictate the door was either open, or at a minimum, ajar, when housekeeping is in the room," Mr. Krauss said.
This interaction may be either non-specific (i. e., solely dictated by electrostatic forces) or specific (i.e., combination of electrostatic forces and specific chemical bonding).
At that stage, Germany's ambitions were either modest or made to seem so as Spain dictated the terms of the play.
These receptors can be either inhibitory or activating, and it is the balance between these opposing signals that dictates the functional status of the cells [3].
