During that time, the United States maintained restrictions on foreign assistance to unified Vietnam.

The U.S., for example, could maintain restrictions on exports and credits to Iraq.

During all those years, it has tried to persuade other governments to maintain equally rigorous restrictions.

But after the Palestinian uprising began in 2000, Israel closed the airport and maintained tight restrictions at the crossings.

That should be reason enough to maintain restrictions on exporting civilian nuclear reactor technology to China.

But the Finance Ministry maintained tight restrictions on certain kinds of bank lending.

It added that the United States was maintaining unwarranted restrictions on the transfer of technology.

Those countries have found that there are no longer any valid reasons for maintaining such restrictions to freedom of movement.

However, the public education system maintains restrictions with regard to the learning of these languages.

Singapore maintains tight restrictions on arts and cultural performances.