Unauthorized "Ministers"

Every non-Catholic "minister" commits the sin of Jeroboam, viz. attempting ordination outside of the divinely appointed order.

(cf. 1 Kings 12:31, 13:33, from the first reading of today's Mass [Saturday of 6th week in ordinary time, year II]).

Since the apostolic mandate of Christ, who, sent by the Father, and, in turn, sent the Apostles with the authority to send (and to confer the sending authority upon) their successors, the only divinely appointed order of ordination is Holy Orders. Men are chosen and sent by the legitimate successors of the Apostles (the bishops of the Catholic Church) in the unbroken historical line, by the laying on of hands and the words of ordination.

Jeroboam sinned against priestly Apostolicity and so does every non-Catholic clergyman. For every true Christian believes in the "One, Holy, Catholic, and Apostolic Church."

Some relevant Gospel texts:

All authority in heaven and on earth has been given to me....

Receive the holy Spirit...

He who hears you hears me...

Go out to all the world...those who listen will be saved...