[1] It is named after the Salic Law which prohibits women from ascending to the throne or obtaining inheritance.
In fact, once aces are in the foundations over the kings, they can be built up to Jacks regardless of suit, even while dealing is in progress as long as the top cards of the columns already dealt are available for play, as well as any applicable card that appears during dealing.
In the rules described by David Parlett, when a King becomes exposed in the tableau it is permissible to transfer the end-card of a column to it as a temporary reserve.
Some implementations of Salic Law in software programs disallow this, making the game much harder to win.
Intrigue is similar to Salic Law, but also involves the queens and building in the foundations goes both ways, downwards from the 5s and upwards from the 6s.