You need to contact:
Suffolk County Dept. of Consumer Affairs:
North County Complex, Bldg. 340
Hauppauge, New York 11788-0099
When I went through it (20+ years ago) I believe the requirement (to be eligible for exam) was for 5 years experience with up to 2 yrs. off for Trade schooling. If you got approved you had to take both a written and practical (hands on) exam.