Restriction as to revoking Orders.
IV. And be it further enacted, That no Order made by the said Commissioners at any of their Meetings shall be revoked or altered, unless at some Meeting to be held for that Purpose (of which Meeting Seven Days Notice shall be given as aforesaid, expressing the Occasion of such Meeting), and also unless a greater Number of Commissioners shall attend at such Meeting to revoke or alter the same than were present when such Order was made; any Thing in this Act contained to the contrary hereof notwithstanding.