An authorized speaker is a speaker that belongs to a socially defined group for whom the use of a distinctive class of linguistic forms is reserved.
The use of distinctive linguistic forms expresses the absolute social deixis of the speaker’s membership in the group.
(Thai)
Thai men and women each use a different politeness particle when speaking.
(Haas 1964)
Levinson, Stephen C. 1979. "Pragmatics and social deixis." In Chiarello 1979
Haas, Mary R. 1964. "Men’s and women’s speech in Koasati." In Hymes 1964 228–233.