What does BLACK ACT mean?

BLACK ACT meaning in Law Dictionary

The statute 9 Geo. I. c. 22, so named as it was occasioned by the outrages dedicated by individuals along with their faces blacked or else concealed, whom appeared in Epping Forest, near Waltham, in Essex, and destroyed the deer there, and committed various other offenses. Repealed by 7 & 8 Geo. IV. c. 27.