formality

nouns

a requirement of etiquette or custom
"a mere formality"
is derived from
a manner that strictly observes all forms and ceremonies
"the formality of his voice made the others pay him close attention"
antonym
compliance with formal rules
"courtroom formality"
is derived from
is a type of (narrower)
acting according to certain accepted standards
"their financial statements are in conformity with generally accepted accounting practices"