Because of established ethical restrictions on the number of animals available for one particular study, low-dose experiments should be given preference to control experiments.
There should also be restrictions on the number of people in the water at any one time, with a respectful distance maintained between divers and sharks.
Little Gransden is just one example of a GA airfield required to comply with planning restrictions on the number of movements permitted, thereby inhibiting further development.
Restrictions on the number of law enforcement agencies that would be allowed to use the legislation.
There are no legal restrictions on the number of eggs that can be implanted.
There will be no restrictions on the number of protesters or the inevitable anti-Bush speeches.
Unlike paper publications, PLoS One has no restrictions on the number of articles it can accept.
David Cameron is considering going into the the next election promising restrictions on the number of windfarms.
Germany and Belgium, for instance, face legal restrictions on the number of troops they can send outside of the country.
In the past, there were no restrictions on the number of permits, or the number and size of drinks.
Now, the only restrictions on the number of pilgrims comes from Saudi Arabia, which is host to the hajj.
