It is necessary to supplement this force in many States. Twentythree States have found it necessary to contract for Mexican workers for short periods of time during the peak harvest season. Although the Mexican migrant worker represents only a small percent of the total of those employed in American agriculture. it Is most vital in many States that these workers be made available when the particular commodity is ready for harvest. In the cottongrowing area of the midSouth an intense program is instituted by the State employment security offices of the Department of Labor to marshal as many workers from the domestic work force as is possible. Advertisements are placed in the papers. ministers tell the story from the pulpit. notices are posted on bulletin boards that workers are badly needed in the cottonfields to harvest the crop. Before any farmer can obtain migrant workers under the provision of the law that is now on the statute books. such employer must enter into an agreement with the United States to do this: (1) To indemnify the United States against loss by reason of its guaranty of such employers contracts. (2) To reimburse the United States for essential expenses. not including salaries or expenses of regular department or agency personnel. Incurred by it for the transportation and subsistence of workers under this title in amounts not to exceed $15 per worker. and (3) To pay to the United States. In any case in which a worker is not returned to the reception center in accordance with the contract entered into under section 501 (5). an amount determined by the Secretary of Labor to be equivalent to the normal cost to the employer of returning other workers from the place of employment to such reception center. less any portion thereof required to be paid by other employers.