If the petition is circulated by more than one person, each petition separately circulated shall have attached to it when filed an affidavit executed by the circulator thereof verifying that he or she personally circulated the document, and verifying the number of signatures thereon. The circulator shall swear or affirm that all the signatures were affixed in his or her presence, that he or she believes them to be the genuine signatures of the persons whose names they purport to be and that each signer had an opportunity before signing to read the full text of the ordinance proposed for enactment or repeal