Where must the certification of proficiency for electric file use be displayed?

The certification of proficiency for electric file use must be displayed at the practitioner's primary work area to ensure compliance with safety and sanitation regulations. This requirement serves multiple purposes: it allows supervisors and clients to verify that the practitioner is properly trained and qualified to use electric files safely. Displaying the certification where it is most relevant (the practitioner’s primary workspace) helps to foster a culture of safety and professionalism, thereby enhancing client trust and promoting adherence to best practices within the workspace.

Placing such documentation in other locations, like restrooms, break rooms, or entrance doors, does not provide the immediate visibility and context needed, which can compromise safety standards and reduce accountability in the working environment.