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Just started using LaTeX so pardon my ignorance here. I was wondering whether style files created for example by Cambridge University Press are free to be used for commercial purposes (a book, respectively) or whether you need a special permission of the publisher? Any help is very much appreciated, preferable with link to the source that provides this information :-)

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Welcome to TeX.sx! You don't have to sign with your name since it automatically appears in the lower right corner of your post. – diabonas Apr 3 '12 at 8:08
Welcome to Tex.sx! – Mu30 Apr 3 '12 at 8:11
A style or class file will have a license statement accompanying it. It's impossible to tell without a pointer. – egreg Apr 3 '12 at 8:19

The classes of the Cambridge University Press include these lines at the beginning of the file:

%% This software may only be used in the preparation of journal articles
%% or books or parts of books to be published by Cambridge University Press.
%% Any other use constitutes an infringement of copyright.

So I'm afraid you can't use them for other purposes, except with special permission of the copyright holder.

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Hi! Thanx so much for your quick answer! I have downloaded all the LaTeX macros, but I am swimming a bit in this sea of documents, which function is not always clear to me. I also cannot spot copy right notes on the Tex documents, nor did I find an extra document with notes on copy right. Where did you find this note precicely? Sorry for my slowlyness and thanx again for your support! Anja – Anja Apr 4 '12 at 8:58
@Anja Take for example EngC.zip: It contains the actual class file EngC.cls, which is responsible for the layout and contains the above copyright notice (ll. 22-24). The other files included in the archive are an example document (EngCguide.tex) that shows you how to use the documentclass and serves as a documentation, and various packages (extension .sty). The other archives follow a similar structure. So the important file that also contains the copyright notice is the .cls file. – diabonas Apr 4 '12 at 9:22

A lot of packages have the licence statement:

%% This package may be distributed under the terms of the LaTeX Project
%% Public License, as described in lppl.txt in the base LaTeX distribution.
%% Either version 1.0 or, at your option, any later version.

the LPPL can be read here or simply run texdoc LPPL

Special packages, which are not on CTAN may have other licence statements with some restrictions. However, I cannot see a problem when using packages from publishers for writing a manuscript.

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Hi! Thank you as well! SO you mean style files that contain the above comment are free for commercial use? If I was to write a study book for example. WHat does CTAN mean? SOrry, I am obviously really new here :-) THanx! – Anja Apr 4 '12 at 9:01
I found out what CTAN is :-) – Anja Apr 4 '12 at 10:23

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