Why do Diocesan Bishops Submit a Letter of Resignation at 75?

Recently, the Cardinal Archbishop of the Archdiocese of New York, Cardinal Timothy Dolan, submitted his mandatory letter of resignation after reaching the age of 75. In this episode of “Answering Catholic with Lawrence the Zealot” the reason about why this happened (and happens) is discussed. For those who would like to see the Canon from the Latin Rite Code of Canon Law that is discussed, you can find Canon 401 §1 and §2 here: https://www.vatican.va/archive/cod-iuris-canonici/eng/documents/cic_lib2-cann368-430_en.html God Love You!