[boost] Copyright notice update policy

Subject: [boost] Copyright notice update policy
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2013-03-02 07:41:46

Hi,

What is the policy of updating year in copyright notices?
There are several pages ([1], [2], [3]) where copyright notice is
explained, but without any notes on the year detail

I found one thread [4] about copyright policy, but it discusses
only copyrighting patches and fixes.

I understand it may depend on local law in particular country,
(i.e. it seems U.S. requires year [5]).
However, without digging law backgrounds, I'd simply like to know what
is Boost policy for the notice updates.

For example, a file created in 2009 includes relevant copyright notice
and in 2013 the file receives update.
Is it required to update the copyright year to 2009-2013?

[1] http://www.boost.org/users/license.html
[2] http://www.boost.org/users/faq.html
[3] http://www.boost.org/users/index.html
[4] http://lists.boost.org/Archives/boost/2012/01/189315.php
[5] http://www.contentious.com/2007/01/07/copyright-notice-is-the-year-really-necessary/

Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net