During the Sede Vacante the person in charge of the affairs of the Church is the Chamberlain (Camerlengo) of the Holy Roman Church. Since 2019 that man has been the (Irish-born) American, Kevin Cardinal Farrell, former Bishop of Dallas, Texas and also former Auxiliary Bishop of Washington, DC.
During the time of the Sede Vacante he functions as the caretaker of the Church and the Regent of the Vatican City-State. The symbol of the Church since the time of the existence of the Papal States, the crossed keys and ombrellino, are placed above his existing coat of arms in the achievement. These may always be used during his tenure in office but, practically speaking, most of those who are Camerlengo make use of these added ornaments only during the Sede Vacante. Special coins will be struck to mark this moment in the Church’s history bearing the arms of the Camerlengo.

This version of Farrell’s arms is by Marco Foppoli.

