(1) An employer (A) must not, in relation to employment by A, harass a person (B)—
(a) who is an employee of A's;
(b) who has applied to A for employment.
(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .