N.H. Admin. Code § Lab 507.01
#2264, eff 1-6-83; ss by #2935, eff 12-27-84; amd by #4854, eff 6-29-90; amd by #5041, eff 1-9-91; ss by #5235, eff 9-27-91, EXPIRED: 9-27-97
New. #6631, INTERIM, eff 11-16-97, EXPIRED: 3-16-98
New. #6806, eff 7-18-98 (formerly Lab 513.01); ss by#7585, eff 10-30-01; ss by #9019, eff 11-1-07