[SAM2000]

What's the technical definition of "Playing Federation" e.g. on the Genesis Device?

[The Ninja Scot]

You are "playing [affilation or faction]" or are an "[affiliation or faction name] player" if you control or have controlled at least one card belonging to that affiliation or faction, or used a multi-affiliation card you have controlled in that affiliation mode at any time during the game, regardless of whether any such cards are still in play. Only cards which you own are considered when determining if you are playing an affiliation or faction.

Michael,
quoting the Glossary under Playing an Affiliation

[Takket]

What's the technical definition of "Playing Federation" e.g. on the Genesis Device?

playing an affiliation

You are "playing [affilation or faction]" or are an "[affiliation or faction name] player" if you control or have controlled at least one card belonging to that affiliation or faction, or used a multi-affiliation card you have controlled in that affiliation mode at any time during the game, regardless of whether any such cards are still in play. Only cards which you own are considered when determining if you are playing an affiliation or faction. See faction.

The phrases "playing Borg", "Borg player", and "Cardassian player" refer to the affiliations, not the species. Thus, a player with non-[Car] Cardassians (like -mode Joret Dal) is not vulnerable to Tekeny Ghemor's special skill that targets "Cardassian players."

Remember that a player who stocks any or cards may not stock any cards from other affiliations. See Borg: Cooperation.