I don't know who started this thread, or who is claiming what, but for
what's it's worth:

Nowhere in my 30 plus years of working in an engineering dominated industry
did I ever hear of a requirement for the average Joe Blow engineer to have a
licence to call himself/herself an engineer.
The only requirement for an engineering licence was to be certified as a
"Professional Engineer" or "PE", the qualifications of which allowed the PE
to "stamp" or approve drawings or designs within his/her licenced
engineering disipline, if required by local codes. The requirements for a
"PE" stamp for an engineering project are in the minority of most routine
engineering tasks.

Whoever is claiming that all "engineers" must be licenced to be legitimate
or legal is blowing wind out of his/her rear.

Eisboch