December 1, 2015 is the next phase-in date under the revised Hazard Communication Standard (HCS).

What does that mean?

The table below summarizes the phase-in dates required under the revised HCS.

GHS Effective Dates for revised Hazard Communication Standard

During the phase-in period, employers are required to be in compliance with either the existing HCS or the revised HCS, or both. OSHA recognizes that hazard communication programs will go through a period of time where labels and SDSs under both standards will be present in the workplace. This will be considered acceptable, and employers are not required to maintain two sets of labels and SDSs for compliance purposes.

Resources