The phrase "basic prerequisite" refers to something that is necessary or required before something else can happen or be achieved. It is an essential step or condition that must be fulfilled. Full definition
This Standard is aimed at buildings with difficult basic prerequisites such as extremely small detached houses in strongly shaded situations. (nypassivehouse.org)
If you have not attended the AdoptCare Basics prerequisite class, be sure to watch the video recording before registering for this course. (adoptex.org)
SAFETY: The basic prerequisite for «real» special situations is ready availability of hard facts and sound premises. (fatpitchfinancials.com)