(a) If an employer discharges an employee, the wages earned and unpaid at the time of discharge are due and payable immediately.
An employer who lays off a group of employees by reason of the termination of seasonal employment in the curing, canning, or drying of any variety of perishable fruit, fish or vegetables, shall be deemed to have made immediate payment when the wages of said employees are paid within a reasonable time as necessary for computation and payment thereof; provided, however, that the reasonable time shall not exceed 72 hours, and further provided that payment shall be made by mail to any employee who so requests and designates a mailing address therefor.