Per NYC Local Law 154 of 2017, it is mandatory to post a notice for all work requiring a tenant protection plan. Here is a link to the Department-Approved notice:
Click To View The TPP Occupants Notice
This notice must be distributed to each occupied dwelling unit;
And in the lobby;
And on each floor within ten feet of the elevator. If the building does not have an elevator, then posted within ten feet of, or in the main stairwell of each floor
Additionally, NYC HPD requires the following notice to be posted:
Click To View the Local Law 159 Notice
Failure to post these notices containing the required contact information may result in the imposition of penalties.
Finally, please be advised that it is required to notify DOB in writing at least 72 hours prior to beginning work that requires a tenant protection plan.
If you have any questions regarding the above stipulations, please contact the Project Manager assigned to your project.