Summary of the rules
Sentences
Rule 5.1 Write short sentences. Use a maximum of 20 words in each sentence.
Rule 5.2 Write only one instruction in each sentence unless two or more actions occur at the same time.
Verbs
Rule 5.3 Write instructions in the imperative (command) form.
Descriptive statements in instructions
Rule 5.4 If you start an instruction with a descriptive statement (dependent phrase or clause), divide that statement from the command with a comma.
Notes
Rule 5.5 Write notes only to give information, not instructions.