A general rule or piece of advice that shows how something should be done, though not always strictly enforced.
“The safety guidelines recommend wearing a helmet during all cycling club rides.”
“According to the posted guidelines, visitors should arrive fifteen minutes before their appointment.”
'Guideline' is slightly softer than 'regulation' or 'requirement' since it suggests recommended practice rather than a strict rule. In Part 2, recognizing this distinction can help you choose between answer options describing mandatory versus optional actions.
Synonyms: recommendation, guidance, instruction