Jude, there is no such thing as "civil equivalent" of a Bill of Attainder. What kind of silly judical fiction are you attempting to write? Are they teaching you that crap in law school?
As far as "equal protection" goes, the constitution is not violated by specifically giving one person rights that another person has not specifically been given, but only if one person is DENIED rights freely given to entire groups of other people. All congress attempted to do was to give Terri a right that others could also petition congress for pursuant to Amendment III.
As far as equal protection is concerned, "statutes create many classifications which do not deny equal protection; it is only 'invidious discrimination' which offends the Constitution." Ferguson v. Skrupa, 372 U.S. 726, 732 (1963); Williamson v. Lee Optical Co., 348 U.S. 483, 489 (1955).
What is invidious about trying to save Terri Schiavo's life from the clutches of judicial tyranny?
I take it you have not taken your Con-Law final yet?
Nor have we covered Amend. XIV yet. Haven't gotten out of the Articles and Amend XI. Amend XIV starts tomorrow.
Sorry, make that "Bill of Rights, Article the third, Amendment I."