(a) whose primary duty consists of the management of the enterprise in which such individual is employed or of a customarily recognized department or subdivision thereof;

(b) who customarily and regularly directs the work of two or more other employees therein;

(c) who has the authority to hire or fire other employees or whose suggestions and recommendations as to the hiring or firing and as to the advancement and promotion or any other change of status of other employees will be given particular weight;

(d) who customarily and regularly exercise discretionary powers; and

(e) who is paid for his services a salary, inclusive of board, lodging, or other allowances and facilities, of not less than the amounts listed below when working in:

(a) whose primary duty consists of the performance of office or nonmanual field work directly related to management policies or general operations of such individual's employer;

(b) who customarily and regularly exercises discretion and independent judgment;

(c) who regularly and directly assists an employer, or an employee employed in a bona fide executive or administrative capacity (e.g., employment as an administrative assistant); or who performs, under only general supervision, work along specialized or technical lines requiring special training, experience or knowledge; and

(d) who is paid for his services a salary, inclusive of board, lodging, or other allowances and facilities, of not less than the amounts listed below when working in:

(a) whose primary duty consists of the performance of work: requiring knowledge of an advanced type in a field of science or learning customarily acquired by a prolonged course of specialized intellectual instruction and study, as distinguished from a general academic education and from an apprenticeship, and from training in the performance of routine mental, manual or physical processes; or original and creative in character in a recognized field of artistic endeavor (as opposed to work which can be produced by a person endowed with general manual or intellectual ability and training), and the result of which depends primarily on the invention, imagination or talent of the employee; and

(b) whose work requires the consistent exercise of discretion and judgment in its performance; or

(c) whose work is predominantly intellectual and varied in character (as opposed to routine mental, manual, mechanical or physical work) and is of such a character that the output produced or the result accomplished cannot be standardized in relation to a given period of time.