5.06. When, for less than 1 day, an employee is assigned to work at a wage higher than his usual wage, he shall receive the higher wage for all hours worked during such assignment. When an employee is assigned to work at a wage lower than his usual wage, he receives no reduction in his wages, except when this assignment is made to avoid a lay off.
R.R.Q., 1981, c. D-2, r. 6, s. 5.06; O.C. 1478-82, s. 3.