An album is defined by Recorded Music New Zealand (RMNZ) as being a type of music release comprising at least five songs or a total playing time of over 25 minutes. Currently, Platinum certifications denote the shipment of 15,000 copies. When RMNZ (then known as the Recording Industry Association of New Zealand) introduced certifications in 1978, to reach Platinum status an album had to ship 20,000 copies. This was reduced to its current level in 1992.