The Sandy Hook Permanent Memorial Commission released design regulations today.  The 5-acre site includes some natural elements that they hope will be involved in the tribute to the children and educators killed on 12-14.  One element is a pond, but it's overgrown and could be costly to clean up.  The Commission wanted to start removing some of the invasive plants, but the Land Use Department suggested it be left as is for now.  There are several terrace-like areas that could be used in a design, along with other open space, if the pond area isn't cleaned up.  Commissioner chairman Kyle Lyddy says a water element was always in peoples thoughts since the beginning of the process.