Solutions Follow rules, with "by" has 6 entries with similar clues
- toed...... the line (followed the rules)
- obeyFollow the rules
- abides-byFollows the laws or rules laid down
- work-to-ruleFollow official working rules and hours exactly in order to reduce output and efficiency
- point-of-orderA query in a formal meeting as to whether the rules of behaviour are being followed correctly
- rough-and-tumbleA competitive situation without rules