Since April 1, they have been enforcing more limits and restrictions.

It is difficult to enforce anti-polygyny laws and restrictions in countries with large rural populations.

Lawmakers feared the growing African population, so they began to enforce restrictions on the number of black people that were imported.

Parents of young drivers, she said, "don't have to have a state law" to enforce such restrictions.

Whether a nursing home may enforce such restrictions has been a question in several lawsuits around the country.

But state and Federal officials say it will be months, probably years, before they have the computer capability to enforce such restrictions throughout the country.

Enforcing restrictions or change to activities within the coastal zone can be difficult as these resources are often very important to people's livelihoods.

The system can also be used to enforce restrictions away from specified locations such as victims' homes, and football grounds.

Frankly, we never enforce restrictions about such matters in our trade agreements with China.

Furthermore, where movie theaters do not have this legal obligation, they may enforce restrictions on their own.