Para 8 of page F-1 of JAR-FCL 1 amendment 7,
New, amended and corrected text will be enclosed within heavy brackets until a subsequent ‘Amendment’ is issued.
or para 2.3 on page 1-0-1 of amendment 1,
2.3 [New, amended and corrected text will be enclosed within heavy brackets until a subsequent
amendment is issued.]
Same style in JAR-OPS (you sure you don't want to be using EU OPS?)