(1) That the affiant is a qualified elector of the territory of the Virgin Islands, or of the election district, as the case may be, referred to in the petition;
(2) his residence, giving town with street and number if any;
(3) that the signers thereto signed with full knowledge of the contents of the petition;
(4) that their respective residences are correctly stated therein;
(5) that they all reside in the election district named in the affidavit;
(6) that each signed on the date set opposite his name; and
(7) that, to the best of affiant's knowledge and belief, the signers are qualified electors and duly registered and enrolled members of the designated party of the territory of the Virgin Islands, or of the election district, as the case may be.