Often places, especially colleges/universities, ask to see high school diplomas prior to enrollment. Employers or certifiers may ask to see one too, regardless of the type of job. My question is, is a highschool diploma a real, legally recognized achievement or barring of status in education, or is it an honorary, social barring? I wonder because it would seem some institutions, places of work, and education facilities far and wide ask to see this as if it were a legally recognized precedent to an initiative, like a job or enrollment or certification of some kind, that they must adhere to by law.
Is a highschool diploma in the U.S. or Canada an actual legal barring to higher education or employment, or is it more of a socially recognized, honorary standing/preliminary?
I ask because it would seem this diploma holds legal doctrines around it when an institution or person demands one as a requirement. Is this a law or is it a choice?
Even a theater job I booked (as an actor) asked to see my highschool diploma when it would seem irrelevant, which is why I ponder if this is a legal initiative or more of a social rule.