Definite procedures or rules which people are expected to observe are known as:

The correct answer is Norms.Key Points

• Norms are a fundamental concept in the social sciences. They are most commonly defined as rules or expectations that are socially enforced.
• Norms may be prescriptive (encouraging positive behavior; for example, “be honest”) or proscriptive (discouraging negative behavior; for example, “do not cheat”).
•  Social norms can both be informal understandings that govern the behavior of members of society, as well as be codified into rules and laws.
• The four types of social norms are folkways, mores, taboos, and laws.
• Folkways are standard behaviors that people follow in their everyday life while interacting with society.

Additional Information

• A sanction, in the social sciences, is a reaction (or the threat or promise of a reaction) by members of a social group indicating approval or disapproval of a mode of conduct and serving to enforce the behavioral standards of the group.
• In sociology, values are the beliefs that we have about what is important, both to us and to society as a whole. They can be implicit or explicit (stated directly). Values help us to decide what is right or wrong, good or bad.
• Mores are social norms that are widely observed within a particular society or culture. Mores determine what is considered morally acceptable or unacceptable within any given culture. 

Thus, Definite procedures or rules which people are expected to observe are known as Norms.