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Date: Mon, 5 May 2003 10:01:21 -0700
From: David Schultz <das@FreeBSD.ORG>
To: "Jeremy C. Reed" <reed@reedmedia.net>
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References: <Pine.LNX.4.43.0305032011270.15827-100000@pilchuck.reedmedia.net>
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cc: chat@FreeBSD.ORG
Subject: Re: open source license with 24 month proprietary clause
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On Sat, May 03, 2003, Jeremy C. Reed wrote:
> Has anyone heard of an open source license where new code based on it can
> be kept proprietary for 24 months?
> 
> Then after the 24 months that code becomes part of the public code base.

The easiest way to do this is to attach a restrictive license or
no license to your code for the first 24 months, then release it
under a less restrictive license such as the BSD license.  For
most purposes, you don't need an uber-license that covers the
terms both before and after the 24-month period.  It's your code,
so you can change the distribution terms as you see fit (aside
from being able to revoke privileges granted by an earlier
license.)