Reportedly, Charlie and Denise have signed a written agreement stating that Denise now has full legal custody of the two girls. Prior to this, Charlie and Denise had joint legal custody.
Sources say that Denise wanted full legal custody due to Charlie's current sobriety issues and criminal problems.
Now that Denise has full legal custody, she can make medical, schooling and other important decisions without getting Charlie's approval. She can also leave the country with the kids without his permission.
Source: Celebrity Baby Scoop.