In the initial release of the Chain of Command:Abyssinia lists the Specific Rules and Playsheet were incorporated in the Italian list. For convenience here is their own post that shall be used for referencing these documents in the future.
Nothing has changed other than a few clarifications of the Irregular rules to make them a little clearer. So replacing the two pages of rules relating to the Irregulars would make the rest of the specific rules current. The playsheet is unchanged.