Twilight's Fall – a separate game. Twilight Imperium's expansions, mods and rules topics are not part of it.

Independence Tower

After you resolve the primary or secondary ability of the "Leadership" strategy card, each other player with units in or adjacent to this system who reveals 1 of your promissory notes from their hand gains 1 command token.
Free Systems CompactUnit – Structure – Monument

Monument

After you resolve the primary or secondary ability of the "Leadership" strategy card, each other player with units in or adjacent to this system who reveals 1 of your promissory notes from their hand gains 1 command token.

Placement
Cultural

Source: Monuments