How many months do you have of a combination of completion of a specialized training in operating heavy construction equipment at a recognized training or trade school AND/OR full-time employment involving the operation of two or more of the following types of equipment: heavy bulldozers, power shovels, draglines, heavy motor patrol graders, steamrollers, overhead cranes, payloaders, heavy diesel tractors and related heavy construction equipment exceeding four tons? The equivalent of two years of full-time employment involving the operation of two or more of the following types of equipment: heavy bulldozers, power shovels, draglines, heavy motor patrol graders, steamrollers, overhead cranes, payloaders, heavy diesel tractors and related heavy construction equipment exceeding four tons; OR.