Actually, the section 9 of the GPLv2 is discussing two alternatives to the (obvious, IMNSHO) option where you are accepting the terms of the license you are reading in the moment you make copies of a GPLd work. Section 14 of the GPLv3 discusses the same two alternatives.
The forementioned sections are in the line of:
* these are the terms of this license; but if someone licenses the work as "GPLvX or later", it means that you have the option (not the obligation) of taking it under the term of later GPL's; and if someone licenses some work as "GPL", it means that you have the option (again, not any obligation) of taking it under the term of any version of the GPL that you care for.
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