NJ A. 3964 An act concerning prevailing wage requirements for certain fabrication Prevailing Wage This bill, sponsored by Assemblyman Eric Houghtaling and signed into law on March 18, 2019, applies prevailing wage requirements for certain custom fabrication work, such as the fabrication of plumbing, heating, cooling, ventilation or exhaust duct systems, and mechanical insulation on public works. Why it matters to working people. Prevailing wage laws serve as a wage floor and ensure a level playing field for workers and contractors alike. It ensures construction projects are top-quality by using highly skilled and well-trained workers to complete projects on time and on budget.