"[T]he order adds additional onerous requirements to the patchwork of existing state and municipal sick leave laws... [Many] laws ... do not allow for the use of sick leave to address the effects of domestic violence. As such, ... unless the regulations address the issues of conflicting laws, a federal contractor will have to allow for the accrual and usage of sick leave under both the local law and the Order.... This will make it extremely difficult for Contractors to accurately track how much sick leave is available and how much has been used by a covered employee."