What does the Grand Mask let an Exile rule, and can its powers be used without a pawn at the site?

Question

Accepted Answer

The Grand Mask lets an Exile rule cards at sites ruled by the Chancellor during their turn, except battle plans, and the Chancellor does not rule them meanwhile. It covers cards at sites only, not the Chancellor's advisers and not the sites themselves. Players report the powers can then be used without your pawn at the site.

Oath: Chronicles of Empire & Exile

What does the Grand Mask let an Exile rule, and can its powers be used without a pawn at the site?