Longman Dictionary of Contemporary English homepage

rulebook

 noun
     
rule‧book
1

go by the rulebook

informal to obey exactly the rules about how something should be done:
If I went by the rulebook, I'd have to report this conversation.
2 [countable] a book of rules, especially one that is given to workers in a job
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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