CVS versus RCS

[Arnaud De Timmerman]

All,

I'd like to use CVS.

The RCS handbook says :
<snip>
RCS and CVS have totally different philosophies with regard to how to prevent
conflicting updates. While RCS enforces a strict rule that no two users
simultaneously update a source file, CVS takes a more pragmatic view that it is
sometimes necessary to allow to users to simultaneously work on the same file."
</snip>.

I don't want simultaneous access. How can I change the CVS settings (or
configure options ?) to make CVS acts like RCS, at least about this "problem".

Thanks.