prescriptive

Relating to or making rules, laws, or directions.

Based on or establishing norms or rules indicating how a language should or should not be used rather than describing the ways in which a language is used.

Of or relating to acquisition or occupancy by prescription.

Sanctioned or authorized by long-standing custom or usage.

Arising from established usage or opinion; customary.

Specifically, in law, pertaining to, resulting from, or based upon prescription.

Consisting in, or acquired by, immemorial or long-continued use and enjoyment; ; pleading the continuance and authority of long custom.

Of or pertaining to the doctrine that acceptable grammatical rules should be prescribed by authority, rather than be determined by common usage.

Of or pertaining to prescribing or enjoining, especially an action or behavior based on a norm or standard.