Welcome, Wordmatters.

Perhaps the word for which you seek is "sumptuary."
Strictly speaking, the word means "Regulation of Expenditure," but the Sumptuary Laws regulated the sort of clothes that certain classes of people were permitted to wear. Many different countries and societies have introduced such laws at one time or another, with varying success: they were never very effective in Britain, but Russia, under Peter the Great, introduced quite successful laws regulating what sort of clothing different conditions of society were allowed to wear.