UL-681 Complete Document History
Standard for Installation and Classification of Burglar and Holdup Alarm Systems

Complete Current Edition:
   15TH EDITION - Standard for Installation and Classification of Burglar and - Jan. 16, 2014
   CHANGE 09/18 - REVISION CHANGE - CODE A - Sept. 4, 2018
   CHANGE 01/21 - REVISION CHANGE - CODE A - Jan. 15, 2021

Obsolete Revision Information:
   13TH EDITION - INSTALLATION & CLASSIFICATION - Feb. 26, 1999
   1994 EDITION - INSTALLATION & CLASSIFICATION - June 29, 1994
   CHANGE 09/91 - INSTALLATION & CLASSIFICATION - Sept. 3, 1991
   CHANGE 07/91 - INSTALLATION & CLASSIFICATION - July 2, 1991
   1991 EDITION - INSTALLATION & CLASSIFICATION - July 1, 1991
   1984 EDITION - INSTALLATION & CLASSIFICATION - Jan. 1, 1984