ChangeAIScript()

The G3 guide says about this action:

"This action changes the assigned script file for the active creature. The new script name is specified in the scriptfile parameter. The level parameter dictates the script level to change - values are from scrlev.ids. Scripts can be set for any scriptable object (container, creature, door etc.), but are not persisted."

Not persisted, really? So if I save the game and reload, the old scripts will return?