Mass Layoff Law and Legal Definition

The term "mass layoff" means a reduction in force which-- (A) is not the result of a plant closing; and (B) results in an employment loss at the single site of employment during any 30-day period for-- (i) (I) at least 33 percent of the employees (excluding any part-time employees); and (II) at least 50 employees (excluding any part-time employees); or (ii) at least 500 employees (excluding any part-time employees). 29 USCS § 2101