Well, was replying to the OP and his linked article, which is an American publication talking about American parishes in the Latin Rite. Not Eastern Catholics, not Orders, etc.
So I don’t feel bad in the least for replying with the rubrics and liturgical rules for US parishes. Catholic Answers, while attracting an international audience, is a US-based company and website and most of their “answers” on their radio program and website are Latin Rite, US centric answers- such as holy days of obligation, liturgical rubrics, etc.
Thank you for listing out some of the exceptions and norms to be found elsewhere.