N.H. Code Admin. R. Saf-C 2505.01
The permit authorizing after market tinting shall remain in the motor vehicle on which the after market tinting is permitted at all times.
Source. #4974, eff 11-13-90; ss by #6204, eff 3-15-96, EXPIRED: 3-15-04 New. #8072, eff 4-23-04; ss by #10083, eff 1-31-12; ss by #13416, eff 7-25-22; ss by #14218, INTERIM., eff 3-25-25; ss by #14382, eff 9-20-25, EXPIRES: 9-20-35