The ticketing system uses the EZ-Link and NETS FlashPay contactless smart cards based upon the System for e-Payments (SeP) system for public transit built on the Singapore Standard for Contactless ePurse Application (CEPAS) system. This system allows for up to 4 card issuers in the market. The EZ-Link card was introduced on 13 April 2002 as a replacement to the original TransitLink farecard while its competitor the NETS FlashPay card entered the smart card market on 9 October 2009. The adult EZ-link card is at S$15 while the NETS FlashPay card is at S$13.