Today, Britney Spears is set to hand over her kids to her ex-husband, Kevin Federline. While their divorce proceedings have been sealed, reports have leaked about Britney's drug and alcohol use. What are the practical implications for parents in Maryland? Custody is always determined by the "best interests of the child" standard, which allows a judge a great deal of discretion in making a determination. Certainly drug use is extremely relevant in determining custody.