This is a crime which is not quite heresy and certain other crimes bring this presumption ipso facto by their very commission.
Canon 2315: A person who is suspected of heresy, and who after admonition has not removed the causwe for submission, shall be forbidden to exercise legasl ecclesiastical acts; if he is a cleric and after repeated admonition has not removed the cause for suspicion, he shall be suspended a divini. (i.e. from Divine things) If a person suspected of heresy has been puniched with the penalties here stated, and does not amend within six months after their imposition, he shall be considered as a heretic and be liable for the penalties for heresy.
Canon 2316: A person who of his own accord and knowingly helps in any manner to propagate heresy, or whocommunicates in sacrexd rites with heretics in violation of the prohibition of Canon 1258, incurs suspicion of heresy.
Canon 2319: Excommunication latae sententiae (incurred by the very commission of hte act) reserved to the Ordinary is incurred by Catholcis:
1. Who contract marriage before a non-Catholic minister in violation of the prhibition of Canon 1063, paragraph 1;
2. WHo marry with the explicit or implied agreement that all or any of the children shall be educated outside the Catholic Church;
3. who knowingly presume to offer their children to non-Catholic ministers for baptism;
4. parents or those who take their place who knowingly have their children educated in a non-Catholic religion.
Persons who do what is forbidden in numbers 2-4 are in addition to the excommunication suspected of heresy.
Canon 2320: Persons who cast away the Sacred Species, or carry off or retain them for an evil purpose, are suspected of heresy, incur excommunication latae senttentiae reserved in a most special manner to the Holy See, are branded ipso facto with infamy, and, if theyr are clerics, deposed.
Each and every one of whatsoever state, degree or condition-whether king, bishop or Cardinal-who appeals from the laws, decrees, or mandates of the reigning Roman Pontiff to an Ecumenical Council, is suspected of heresy, and incurs ipso facto excommunication reserved in a special manner to the Apostolic See. Universities, colleges, chapters, or other legal bodies, by whatsoever name they may be known, incur an interdict reserved in a special manner to the Apostolic See. (Canon 2332) This is a restatement of the Bull Exsecrabilis. See also Crimes against the Papacy.
Canon 2340: If a person with obstinate mind remains under the censure of excommunication for one year, he is suspected of heresy.
Canon 2371: All those, including those of the episcopal dignity, who through simony knowingly promote a man to or are promoted to orders, or who administer or receive other sacraments through simony, are suspected of heresy; clerics, moreover, incur suspension reserved to the Apostolic See.
This is a crime which is not quite heresy and certain other crimes bring this presumption ipso facto by their very commission. 
