Most of the “white collar” exemptions (executive, administrative, and professional, referred to by the DOL as "EAP"), were scheduled to be updated December 1, 2016. https://www.federalregister.gov/documents/2016/05/23/2016-11754/defining-and-delimiting-the-exemptions-for-executive-administrative-professional-outside-sales-and contains significant revisions of key provisions of 29 CFR Part 541.
However, implementation of the 2016 Final Rule has been enjoined, possibly temporarily. It is important to keep in mind that this is a preliminary injunction. https://www.texasattorneygeneral.gov/files/epress/Overtime_-_PI_Grant_(11-22-16).pdf?cachebuster%3A93=&utm_content=&utm_medium=email&utm_name=&utm_source=govdelivery&utm_term= accesses the court’s ruling.
https://www.dol.gov/whd/overtime/final2016/ is a DOL statement regarding the preliminary injunction and an explanation of the enjoined regulatory changes.
The "white collar" exemptions, affecting numerous occupations, emanate from only two sections of the FLSA - sections 13(a)(1) and 13(a)(17). Thirty-nine sections of the FLSA set forth various overtime exemptions. However, when most employers use the term "exemption," the reference is to one of the "white collar" exemption areas.
These two exemption sections are explained at Code of Federal Regulations Title 29 Part 541. These are not "overtime regulations," they are exemption regulations. The term "overtime regulations" has been frequently and erroneously applied to Part 541 since 2003, in part because the DOL improperly uses that expression in press releases.
The April 23, 2004 Final Rule (Title 29 Part 541) may be accessed at https://www.dol.gov/whd/overtime/regulations_final.htm. The preamble is located at https://www.dol.gov/whd/overtime/preamble.pdf.
A roll-back to exemption status with regard to employees newly classified as nonexempt should be done very cautiously, if at all. There is a high probability that, in typical places of employment, many of these employees were previously misclassified, based on the duties tests.