Pennsylvania Statutes Title 43 P.S. Labor § 168.3. Prohibited employment

(a) Prohibition.--An employer may not knowingly employ an unauthorized employee.

(b) Verification.--On and after the effective date of this section, each employer who hires an employee shall verify the employment eligibility of the employee through the E-Verify program and shall keep a record of the verification for the duration of the employee's employment or three years, whichever is longer.

(c) Staffing agencies.--If a staffing agency supplies workers to multiple industries, subsections (a) and (b) shall only apply to workers supplied for the construction industry.