The factors to determine whether OSIC can look into a particular matter are, first, that it needs to be a matter related to maltreatment, discrimination or another prohibited behaviour.
Second, as you mentioned, the organization needs to be signed on to the OSIC.
The third point—which is one that is sometimes a little more tricky and speaks to the gaps in the system currently in how we need to move forward—is around the status of the participant. The person who is alleged to have committed the violation is truly, for lack of a better word, the anchor point of that jurisdiction. The status of the alleged victims, survivors and the people impacted is not determinative. The respondent—the person who is alleged to have committed the violation—needs to be under the authority of the signatory organization for OSIC at least to have the ability to look into the matter.
If we don't have the ability, we at least need to know that there is another place that can help the person who came forward, and we can accompany them and empower them to be in a place where they can get the help needed.