More specific rules can be set for games and may vary each time the game is played.

The rules on that vary from one country to another.

Laws and rules didn't vary a whole lot from one group to the next.

As a result the rules vary significantly around the state.

The rules vary to a great extent between the countries.

At the present time, the rules on immigration vary from one country to another.

The rules may vary slightly but are generally very similar.

Comparing 529 programs is difficult because rules vary by state.

These rules never vary, and it would be illegal to do so.

Rules vary, but two main forms survive to the present day.