July 7, 2016. The law that gutted civil service, Act 150, went into effect on July 1, 2016, although some changes won't be implemented right away. Here is a link to a set of FAQs about the changes.
There was also a public hearing before the Senate Committee on Labor and Government Reform where DOA officials (Cate Zueske and Stacey Rolston) described the implementation of Act 150. Below is a link to the video (it's about 2 hours).