While reviewing 971 I noted that [structure.specifications]/7 says:

-7- Error conditions specify conditions where a function may fail. The conditions are listed, together with a suitable explanation, as the enum class errc constants (19.5) that could be used as an argument to function make_error_condition (19.5.3.6).

This paragraph should mention make_error_code or the text "that could be used as an argument to function make_error_condition (19.5.3.6)" should be deleted. I believe this is editorial.