Never heard of the Magic 13. Etiquette rules change with the place, people, and reason for the interaction.
True are false the rules of etiquette are universal across cultures and enviornments
Strangely enough- no. Etiquette is a set of rules for behavior developed in a given region- and they can vary from region to region. What is polite in one area may be very impolite in another.
Classroom etiquette are rules that apply to a classroom that a teacher gives.
The rules of etiquette imply observance of the requirements of good behavior in society
Give guidance in all interpersonal interactions , that is the purpose of etiquette.
europe
§Protocols are the standards of etiquette in your place of employment
Etiquette Definitions The Rules of Play
A course dealing with the rules of language is a course in grammar.
Etiquette is the conventional rules of conduct. It is a code of conduct that defined the rules of social behaviour
The best action would probably to sit down and coach the employee your company's expectations in business etiquette. One of the best ways to go about this is to explain that the employee represents the company and they are expected show professionalism when dealing with customers, suppliers, etc.
Manners-etiquette. Netiquette is on the net.