More on Friday abstinence I

More on Friday abstinence
I posted earlier on our obligation (in the Latin Rite) to abstain from meat (or, in the U.S., perform another penitential or charitable act) on Fridays not only during Lent but all through the year.
Richard Chonak graced our blog with a visit and noted,

…that Ordinaries have the authority to dispense from the Friday obligation. In Boston this is done if St. Patrick’s day (one of the patronal days of the archdiocese) should fall on a Friday. This allows his devotees to eat corned beef and cabbage.