According to the agency, OSHA will start enforcement of the final rule on occupational exposure to beryllium in construction, shipyard, and general industries on May 11, 2018.
The start of enforcement had previously been set for March 12, 2018. In response to feedback from stakeholders, the agency is considering technical updates to clarify and simplify compliance. In the interim, if an employer fails to meet the new exposure limits, OSHA will inform the employer and offer assistance to ensure compliance.
Here is more information. 3/19/2018