The law about this varies a lot in different countries.

The laws in each state vary from one to another.

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

The law of different countries varies slightly on that point.

The laws of driving under the influence vary between by countries.

The laws about child custody will vary from one country to another.

In the case of positive tests, local and state laws vary as to whether patients' conditions are reported to public health officials.

But the current laws in the individual nations vary widely.

Laws vary as to the waiting period before a divorce is effective.

And the laws may vary as to the amount of flexibility a judge can use.