I want to know the answer to the following question:
When was ISO/IEC 646 published?
All the background I'm provided with is that "From early in its development, ASCII was intended to be just one of several national variants of an international character code standard, ultimately published as ISO/IEC 646 (1972), which would share most characters in common but assign other locally useful characters to several code points reserved for "national use."". Is that enough to answer the question?
Answer: yes