N.J. Stat. Ann. § 45:5AA-4

4. A person seeking certification as a landscape irrigation contractor shall apply therefor on forms prescribed and provided by the board, and pay the application fee established by the board. In addition to any other information or documents that may be required by the board, each applicant shall submit satisfactory evidence that the applicant is at least 18 years of age, has no unresolved violations with the board and has a minimum of three years' experience within the last 15 years in the field of landscape irrigation. Field experience acquired after January 1, 1997 must comply with the requirements of P.L.1991, c.27 (C.45:5AA-1 et seq.).