Fluent6.2 help doc 中的一部分，请问where is a special license?

heidip

2.3 Installing the PEM Fuel Cell Model

The PEM Fuel Cell (PEMFC) model is provided as an addon module with the standard FLUENT licensed software. A special license is required to use the PEMFC model.
2.4 Loading the PEM Fuel Cell Module

The PEM Fuel Cell (PEMFC) module is loaded into FLUENT through the text user interface (TUI). The module can only be loaded after a valid FLUENT case file has been set or read. The text command to load the addon module is

define / models  / addon-module
我怎么没有找到addon-module ？与special license 有关吧？
谢谢各位！
[color=#FF00FF]文字[color=#FF00FF]A special license A special license