“ Each of the several persons mentioned in the preamble to this Act is hereby declared to have been and to be capable of being elected and of sitting and voting in the House of Commons as a Member thereof, notwithstanding his having held or holding at the time of his election or of his so sitting and voting, the office mentioned in the preamble as having been or being held by him, and notwithstanding that any salary may heretofore have been paid, or may hereafter be legally attached to the said offices or any of them, provided he was not, and so long as he shall not be, otherwise disqualified ”