Apostate Jorge Bergoglio: No Catholic Mass available? Just go to the Anglicans!
It is not licit for the faithful by any manner to assist actively or to have a part in the sacred [rites] of non-Catholics.
(Canon 1258 §1)
Whoever in any manner willingly and knowingly helps in the promulgation of heresy, or who communicates in things divine [=assists at sacred rites] with heretics against the prescription of Canon 1258, is suspected of heresy.
(Canon 2316)
It is unlawful for Catholics in any way to assist actively at or take part in the worship of non-Catholics (Canon 1258). Such assistance is intrinsically and gravely evil; for (a) if the worship is non-Catholic in its form (e.g., Mohammedan ablutions, the Jewish paschal meal, revivalistic “hitting the trail,” the right hand of fellowship, etc.), it expresses a belief in the false creed symbolized; (b) if the worship is Catholic in form, but is under the auspices of a non-Catholic body (e.g., Baptism as administered by a Protestant minister, or Mass as celebrated by a schismatical priest), it expresses either faith in a false religious body or rebellion against the true Church.
(Rev. John A. McHugh, O.P. & Rev. Charles J. Callan, O.P., Moral Theology: A Complete Course Based on St. Thomas Aquinas and the Best Modern Authorities, vol. I [New York, NY: Joseph F. Wagner, 1958], n. 964)