Do you think they were valid at the time he wrote?

No problem so far, for the will remains valid at civil law.

Licenses are valid for up to one year** at a time.

The retail price of a knife is valid only at the moment it was purchased.

People change and the marriage that was valid at one time may lose its validity.

That is individual demand curves may not be valid at certain prices.

Fortunately the security certificate was still valid at that point.

The past justifications for the tradition are still valid at present.

I don't believe those reasons are valid at this time.

They will be valid until 1 July 2011 at maximum.