//All code had to be reviewed before it was checked into the team's version control software.//
Their first rule above is based on how incompetent their RTC tool sets are. I wouldn't say this is a best practice.
That's why I feel that their first rule of their study is based on the shortcomings in RTC's jazz version control system.
However the code review best practices came out of the study are solid. However they do not touch upon the version control practices.