The phrase "are of limited duration" is correct and usable in written English.
It can be used to describe something that lasts for a short period of time or is temporary in nature.
Example: "The offers available during the sale are of limited duration, so be sure to take advantage of them while you can."
Alternatives: "are temporary" or "are short-lived".
These commitments are of limited duration, usually 15 days - enough, it is hoped, to allow for a probate court hearing.
Many side effects can be minimized or palliated and are of limited duration.
Conventional delivery methods are of limited duration and are unresponsive to the local environment.
"They are of limited duration and each (is) assigned a specific task by the council.
The contracts referred to in (d) may continue until they expire, provided they are of limited duration comparable to the durations specified in Article 4. The contracts referred to in (a) may continue until they expire.
The contracts referred to in (b) and (d) may continue until they expire, provided they are of limited duration comparable to the durations specified in Article 4. As the legislative procedure for revision of this regulation has been in operation since 2000, this transitional provision can be substantially shortened.
The rationale that was developed after observing this erosion on SDS 11 was that it was of limited duration, that it was self-limiting in that as soon as the pressure in the cavity either between the putty and the primary O ring after the primary O ring seats, or the presssure between the primary and secondary O rings equals the motor pressure, the flow stops and the erosion stops.
Candidacy for the doctorate is of limited duration.
Early this morning, Army spokesmen had hinted that the operation would be of limited duration.
Mr. Mirza warned that the recent interest in sound art may be of limited duration.
Military commands were of limited duration and subject to regular renewal.
