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XBRL US submitted a comment letter in response to the Securities and Exchange Commission's Request for Comment on the 2021 Q4 release draft which updates the Closed-End Fund (CEF) from the previous version that was out for public review in April 2020.
Read the release announcement.
Read the XBRL US letter: XBRL US Comment on Draft 2022 SEC Taxonomies_11_1_2021