1.  An executive order to revoke federal contracts of businesses that hire illegal workers.

2.  Illegal workers are often cheated by employers.

3.  Illegal workers tend to be concentrated in service industries, agriculture, garment manufacturing, and in urban construction.

4.  Although there are no accurate estimates of the number of illegal workers, officials acknowledge that enforcement of employer sanctions has lagged significantly in recent years.

5.  And the way the immigration laws are enforced makes illegal workers especially fearful to report substandard wages and dangerous working conditions, experts say.

6.  Attention is now being turned on the employers who hired the illegal workers.

7.  Both made their fortunes by employing fellow illegal workers in the United States.

8.  Both sides agree that the prevalence of illegal workers gives a skewed picture of the farm labor market.

9.  A contractor in western Palm Beach County, who asked that his identity be protected, said harvests are done almost exclusively by illegal workers from Mexico.

10.  A lawyer for the company, Colin Service Systems Inc., based in White Plains, said it had never knowingly hired illegal workers and would contest the fines.