I ran into a similar problem when I checked into a teaching job after the oil boom of the late 70s crashed.
Despite being a geologist who has not only taught when I was an undergrad and a grad student, and having years in my field in industry, without the 22 semester hours required to get a teaching certificate (actually more in my case because I took Archaeology courses as an undergrad instead of 101 Sociology and Psychology), they could not hire me to teach Middle School Earth Science.
I didn’t realize it went that far back, time wise.
Best job I never took was an entry-level engineering position with Exxon in 1982. I’d have been on the street in less than 6 months looking to break an apartment lease in Houston. The offer money was great, though!