You must keep them for a period of at least four years.

But treatment can keep symptoms away for long periods of time.

We may be able to allow you to keep some records for a shorter period.

At the same time, the city did not want to keep people out of their businesses and homes for long periods.

The envelope is kept for a period of five years, and the term can be renewed once.

I couldn't afford to keep the position unmanned for such a period of time.

Had you withdrawn the money and the account been closed, records would only have to be kept for a limited period.

You may be able to keep your right for a certain period after the date when your husband died.

Stock can be kept for extended periods in this manner.

Some experts say the embryos can be kept for long periods.