Non-prerequisite

Permits granted prior to other (non-prerequisite) authorizations by other agencies should, where appropriate, be conditioned in such manner as to give those other authorities an opportunity to undertake their review without the applicant biasing such review by making substantial resource commitments on the basis of the DA permit.

Source: wiktionary

In other words, it is able to execute its code normally without the cooperation of any non-prerequisite function.

Source: wiktionary

In contrast, the non-prerequisite skills fared far worse.

Source: wiktionary

Speaking of baptism as a non-prerequisite to the Supper, the Churchman says : "We need not say to churchmen that this \& a view which is utterly repugnant to the whole teaching of the church in every age, and to the whole course of history."

Source: wiktionary