Add the following to the end of the rule called “Humans”:

Any Human designated with a definite article (eg “The”) is an Individual. Any Human designated with an indefinite article (eg “A”) is a Class.

Add a new rule to the ruleset, entitled Infiltration:

Each Shifter has a Cover score, which is a numerical value tracked in the GNDT, and which defaults to 20.

Add the following to the end of the rule called “Form”:

If any two or more Shifters have the same Form, and that Form is the Form of an Individual Human, then any other Shifter (or the Forest) may reduce the Cover of those Shifters by 2 each, provided that none of those Shifters have been so penalised since the last time a Day Dawned.