It had become illegal in the European Union, including F1 races.

Driving around on a double date, for most high school juniors and seniors, has become illegal.

Trading in foreign currency has become illegal and many shops are subject to rationing.

My father and mother were not married as marriages had long since become illegal.

After the defeat of June 1940, he returned to Paris to find that his militant activities had become illegal.

As a result of the 1905-1906 reforms, mass formation plays became illegal and forward passes legal.

While there were no limitations on reading, it became illegal to teach slaves to write.

Some of those lifestyles have since become illegal or simply died out, but others remain.

In effect, it is becoming illegal for governments to hinder the profits of big business.

Question One was: when did the flight become illegal?