Too late to edit… the earliest relevant public reference I have found is https://groups.google.com/g/comp.lang.c/c/Tw-pMLfC52M/m/VQIm1NMfe98J https://groups.goo

Too late to edit… the earliest relevant public reference I have found is https://groups.google.com/g/comp.lang.c/c/Tw-pMLfC52M/m/VQIm1NMfe98J https://groups.google.com/g/comp.lang.c/c/Tw-pMLfC52M/m/VQIm... including the phrase “a presentation of the issues involved there (and hopefully a solution) are planned for the next X3J11 meeting” which to me suggests that X3J11 created locales themselves.