Effective date: July 1, 1964 (Order No. 55567)
Chapter revised effective October 21, 1974 (Order No. 60922)
Regulation .01 amended effective January 15, 1996 (23:1 Md. R. 35)
Regulation .02 amended effective May 5, 1986 (13:9 Md. R. 1032); January 15, 1996 (23:1 Md. R. 35); February 7, 2000 (27:2 Md. R. 145); March 26, 2007 (34:6 Md. R. 629)
Regulation .02A amended as an emergency provision effective October 30, 1985 (12:22 Md. R. 2102)(Emergency provisions are temporary and not printed in COMAR)
Regulation .02C amended effective December 25, 1989 (16:25 Md. R. 2715)
Regulation .04 amended effective January 15, 1996 (23:1 Md. R. 35); January 15, 1996 (23:1 Md. R. 35); February 7, 2000 (27:2 Md. R. 145)