Difference between Obligatory and Prerequisite

OBLIGATORY vs PREREQUISITE: NOUN

Something that is prerequisite, as a course that is required prior to taking an advanced course.
A condition required beforehand; a preliminary necessity.
Something previously required, or necessary to an end or effect proposed.
Something that must be gained in order to gain something else
In education, a course or topic that must be completed before another course or topic can be started. May be colloquially referred to as a prereq.
Something that is required in advance

Morally or legally constraining or binding
Of the nature of an obligation; compulsory.
Required as part of a routine course of action or cultural expectation; predictable.
Obligate.
Required by obligation or compulsion or convention
Requiring a matter or obligation.
Imposing obligation, morally or legally; binding: an obligatory promise.
Binding in law or conscience; imposing duty or obligation; requiring performance or forbearance of some act; -- often followed by on or upon.

Imposing obligation; binding in law or conscience; imposing duty; requiring performance of or forbearance from some act: followed by on before the person, formerly by to.

Statutory, Minimum, Requirement, Mandated, Obliged, Incumbent on, Imposed, Bounden, Indispensable, Necessary, Prerequisite, Required, De rigueur, Mandatory, Compulsory

Precursor, Element, Vital, Crucial, Imperative, Requisite, Necessity, Indispensable, Required, Necessary, Criterion, Essential, Precondition, Obligatory, Requirement

Statutory, Minimum, Requirement, Mandated, Obliged, Incumbent on, Imposed, Bounden, Indispensable, Necessary, Prerequisite, Required, De rigueur, Mandatory, Compulsory

Requirements, Element, Vital, Crucial, Imperative, Requisite, Necessity, Indispensable, Required, Necessary, Criterion, Essential, Precondition, Obligatory, Requirement

But it is not obligatory in this case.
Obligatory use of local labor, plant and material.
APA the cover page is not always obligatory.
Obligatory committees needed to do businessaudit, budget etcvi.
Telugu Meaning of Obligatory or Meaning of Obligatory in Telugu.
This Act applies to obligatory insurance contracts with the specifications arising from the Act which establishes obligatory insurance.
The state obligatory standards of relevant levels of education are obligatory for all educational organizations irrespective of their form of ownership, types and kinds.
If one is performing dry ablution for an obligatory prayer, one must intend its being obligatory, though need not specify whether.
It shows that circumcision was obligatory upon him and therefore obligatory on all men.
But I feel this obligatory part is looking a lot less obligatory.

Monopoly is a prerequisite for the emergence of monopoly prices, but it is not the only prerequisite.
If a prerequisite is retaken, only the grade received in the most recent course is calculated into the prerequisite GPA.
PREREQUISITE CHALLENGE POLICY AND PROCEDURESCOURSE PREREQUISITE POLICYPrerequisite means the preparation or previous course work considered necessary for success in the course.
If prerequisite coursework was repeated, the program will use the highest grade in the prerequisite GPA calculation.
In cases where credits are directly linked to a base prerequisite, only the prerequisite needs to be appealed.
Prerequisite coursework GPA will be calculated to include all occurrences, including retakes, of all required prerequisite courses.
If the prerequisite course was taken at PCC, the prerequisite requirement will be automatically cleared.
Not all courses taken in a prerequisite field are used to compute a prerequisite GPA.
Prerequisite Courses: Applicants must complete all prerequisite courses prior to the start of school.
WHO APPROVES PREREQUISITE CHALLENGESWHAT OFFICE PROCESSES PREREQUISITE CHALLENGES?