https://www.newsweek.com/nuns-denounce-pope-francis-break-catholic-church-1903818#:~:text=Sixteen%20Spanish%20nuns%20have%20announced,who%20was%20excommunicated%20in%202019.

80. In case any Bishop, or Presbyter, or Deacon, or anyone else on the list of the Clergy, or any layman, without any graver necessity or any particular difficulty compelling him to absent himself from his own church for a very long time, fails to attend church on Sundays for three consecutive weeks, while living in the city, if he be a Cleric, let him be deposed from office; but if he be a layman, let him be removed from Communion.