To maintain, restore and enhance library services including: (1) Providing children/teen services, such as homework help, computer classes, and school outreach; (2) Enhancing senior/disabled services; (3) Maintaining/restoring Library hours at all branches; (4) Keeping materials and services current, shall an ordinance be adopted extending the existing voter-approved sales tax at the adjusted rate of 1/4 cent, raising approximately $4 million annually, for 15 years, with citizen oversight, and requiring that all funds benefit Nevada County libraries?