where they sit. A coaster where riders are assigned seats before boarding does not meet this requirement. The amusement park or theme park operating a coaster that is recognized as a Coaster Classic is usually presented a custom plaque. The plaque typically states: It has been noted, however, that most coasters usually have disqualifying ratcheting lap bars, seat dividers and headrests to prevent people from trying to stand up during the ride. For example, Rolling Thunder at Six Flags Great Adventure had buzz bars which meet traditional lap bar Coaster Classic requirements, but it is not a classic because of headrests and seat dividers being added in 1981 to prevent people from standing up during the ride. Coasters awarded As of , there are 30 coasters worldwide with ACE Coaster Classic status; 20 in North America, 9 in Europe, and one in Australia. Rescinded awards Another 13 coasters were awarded ACE Coaster Classic status; 12 in North America and one in Europe. However, due to subsequent changes to the coasters, the awards have been rescinded. Coaster Landmark In 2002, ACE introduced the Roller Coaster Landmark program to recognize coasters of historic significance that may or may not qualify for ACE Coaster Classic status. Golden Age Coaster The Golden Age Coaster award, a prequel to the Roller Coaster Landmark award, was established to recognize significant roller coasters that were built during the 1920s. Giant Dipper at Santa Cruz Beach Boardwalk, and Giant Dipper at Belmont Park (San Diego) both received the Golden Age Coaster award in addition to the Roller Coaster Landmark award. Preservation ACE takes an active role in the preservation of endangered roller coasters. Since 1985, the club has either directly or indirectly helped save more than half a dozen. One of the most notable include the Phoenix located at Knoebels Amusement Resort in Elysburg, Pennsylvania. The wooden coaster was relocated from Playland Park in San Antonio, Texas. Another that the organization saved was Leap the Dips, the world's oldest operating roller coaster, located at Lakemont Park in Altoona, Pennsylvania. In addition to preservation, some parks have also sought the opinions of ACE members regarding roller coaster installations, such as Magnum XL-200 at Cedar Point and roller coaster design, as was the case with The Legend and The Voyage at Holiday World in Santa Claus, Indiana. References External links American Coaster Enthusiasts (ACE) (Official website) Clubs and societies in