CathInfo.com

I choose to accept Canon Law as authentic Catholic teaching.  This is where we disagree.  

Canon law may be divided into various branches, according to the points of view from which it is considered: (1) If we consider its sources, it comprises Divine law, including natural law, based on the nature of things and on the constitution given by Jesus Christ to His Church; and human or positive law, formulated by the legislator, in conformity with the Divine law. (2) If we consider the form in which it is found, we have the written law (jus scriptum) comprising the laws promulgated by the competent authorities, and the unwritten law (jus non scripture), or even customary law, resulting from practice and custom; the latter however became less important as the written law developed. (3) If we consider the subject matter of the law, we have the public law (jus publicuм) and private law (jus privatum). This division is explained in two different ways by the different schools of writers: for most of the adherents of the Roman school, e.g. Cavagnis (Instit. jur. publ. eccl., Rome, 1906, I, 8 ), public law is the law of the Church as a perfect society, and even as a perfect society such as it has been established by its Divine founder: private law would therefore embrace all the regulations of the ecclesiastical authorities concerning the internal organization of that society, the functions of its ministers, the rights and duties of its members. Thus understood, the public ecclesiastical law would be derived almost exclusively from Divine and natural law.