Is https://wiki.zmanda.com/index.php/Perl_Interface up to date?

Hi,

Looking in https://wiki.zmanda.com/index.php/Perl_Interface, I see:

  Amanda requires at least perl-5.6.0. Any features not available in
  that version are prohibited. Due to the impossibility of testing>
  all version combinations, and the difficulty of installing,
  no CPAN-based or other third-party modules are permitted

For current Amanda versions, is perl 5.6.0 still the limit?
It seems a bit old. Also, I see current source in GitHub that
contains 'use JSON' which (as far as I know) is not a core
module.

Is there another document that gives more current guidelines on
what is or is not permitted in current Amanda versions?

Thanks,
-Chap