Canon 188.4 is explained here.
Stubborn, in that link above, you are referencing your earlier post that includes the following quote from 1917 Canon Law:
On delicts against the faith and unity of the Church
Canon 2314
§ 1. All apostates from the Christian faith and each and every heretic or schismatic:
1.° Incur by that fact excommunication;
2.° Unless they respect warnings, they are deprived of benefice, dignity, pension, office, or other duty that they have in the Church, they are declared infamous, and [if] clerics, with the warning being repeated, [they are] are deposed;
3.° If they give their names to non-Catholic sects or publicly adhere [to them], they are by that fact infamous, and with due regard for the prescription of Canon 188, n. 4, clerics, the previous warnings having been useless, are degraded.
In 1917 Canon Law there are 3 levels of excommunication:
1. automatic, ipso facto, excommunication.
2. declared excommunication.
3. banned excommunication.
Each of these levels has its own penalties that are increased at each level. At the first level, the automatic [
ipso facto] level, the excommunicate is "
removed from legitimate ecclesiastical acts" and "
prohibited from conducting ecclesiastical offices or responsibilities" (Canon 2263). At the next level, the "declared" level, the excommunicate is further deprived of "the fruits" of his office, such as a salary or pension (Canon 2266). And at the "banned" level, the excommunicate is finally deposed from the office itself (Canon 2266).
Now let's move to our current situation and apply Canon 2314 and Canon 2263 to Jorge Bergoglio. Following Canon 2314, Bergoglio, is an
ipso facto excommunicate on account of manifest heresy. Therefore, he is automatically "removed from legitimate ecclesiastical acts" and "prohibited from conducting ecclesiastical offices and responsibilities" according to Canon 2263.
This means Bergoglio is in a state of being "deprived" of his legal ability to act as a governor of the Church. In other words, he is "impounded" until the next step is taken to "declare" him as "infamous."
However, for all practical purposes, even as a simple
ipso facto excommunicate, Bergoglio cannot be viewed legally as an "
acting Pope." At best, he is in a state of legal suspension awaiting a juridical declaration. Therefore, by the above logic of 1917 Canon Law, one who believes that Bergoglio is a manifest heretic must be at least a Sede-privationist or Sede-impoundist.
P.S. All of the above assumes that Bergoglio was lawfully-elected (
which he wasn't). And since Bergoglio never was lawfully-elected Pope, the See is, in fact, completely vacant, practically and ontologically.