line 99, provide list of the five items as a para after the ':'
line 107, an organization's --> their
line 131, provide bulleted list as new para after 'parts:'
line 139, implementation/operations --> implementation and operations
line 140, Functions --> functions
line 140, --Identify --> : Identify
line 144, References --> references
line 160, there are a number of terms in "quotes", would italics improve readability ?
line 176, – Identify ..., Recover – --> (Identify ..., Recover)
line 180, The non-exhaustive --> A non-exhaustive
line 186, reduce Cybersecurity risk --> mitigate cybersecurity risk
line 216, legal/regulatory --> legal and regulatory
line 222, business/mission --> business
line 228, The following steps --> The following sub sections
line 238, overall --> their overall
line 253, Organizations also may --> Organizations may
line 253, The Organization also may --> The organization may
line 260, cost/benefit --> "cost benefit"
line 273, 5 --> five
line 274, prevalent --> used
line 279, consider: should be customized and read in conjunction with information sources relevant to an ...
line 297, regarding --> in response to

just for consistency between documents:
line 8, Raphael Cohn --> Raphael J Cohn (as per core MQTT spec)