Please note that the statement you quoted is posted on the web site of St. Nicholas Orthodox Church (ROCOR) in Dallas, TX. The statement represents the practice of that parish and that parish alone. The practice described therein is not obligatory upon those who are not members of St. Nicholas Church. As you become Orthodox, you will learn what is expected of you at the parish you choose to join. Your local parish practice in preparation for Communion is the only practice you are required to follow.