- Effective July 2019
- Effective July 2018
- Effective December 14, 2017
- Effective July 2017
- Effective July 2016
- Effective November 9, 2015
- Effective July 2015
- Effective January 8, 2015 for members of OE3
- Effective September 15, 2014 for members of OE3
- Effective July 2014 and January 2015 for Management and Confidential
- Effective July 2013
- Effective July 2012
- Effective July 2012