abbreviation for possessive and plural

In a sentence, there is the name of a company followed by an abbreviation, the initials of the company, in parentheses. The company name is a possessive in this sentence. Where does the apostrophe go? I want to know how this would work, as I am having trouble finding anything but advice to restructure the sentence, and I would like an answer that gives me what to do with the sentence as it stands.

Example: This policy sets a standard for determining access to Introspective Illusions (II) resources.

Would it be Introspective Illusions’ (II’s) or  Introspective Illusions’ (II) or some other construction?