All of your catechisms must be post VC II. There's no mention of this nonsense in my catechism. If the above statement were true, anybody who communicates daily or often can assume his venial sins are forgiven and he his "preserved" from "grave (mortal) sin", ergo, no need for Confession. Maybe that's why my Novus Ordo church only offers the "Sacrament of Reconciliation" 20 minutes a week.
Well, Christ thought there was a need for Confession and I'll stick with Him and not your New Catechism.