Do you seriously not understand that prescribing that someone wear special clothing and forbidding them from holding office is not a dogma (irreformable doctrine), because it is not a doctrine (teaching) at all, but merely a legislative prescription?
If your pastor decides that he wants to do business with a different landscaping company than the church has previously worked with, is he "changing a dogma"? What if he throws away the old folding chairs from the church hall and buys new ones? Is he "changing a dogma"? Does he need to check the Bible to be sure that it allows him to throw away folding chairs? Wait, where does the Bible even permit folding chairs in the church hall? Where does the Bible permit church halls at all?
Do you see yet how ridiculous this gets? Not everything your church leadership does or says is Biblically warranted, unchangeable doctrine. Same goes for ours.
RC canon law says ecumenical councils and their rulings are binding….in other words dogma.
The excuses RCs concoct to avoid their past.