Official rule text
66.1 During the action phase, if the active player has the “Politics” in the active system the units can be placed. strategy card, they can perform a strategic action to resolve that card’s primary ability. 67.4 When a player produces a unit through an ability outside of the tactical action, that ability will state how many units that player
View official source
Source: Twilight Imperium: Fourth Edition - Living Rules Reference: Prophecy of Kings
Expansion: Prophecy of Kings
Version: 2.0
Reference: Rule 66.1