The Commission published an advance notice of proposed rulemaking (ANPRM) in the Federal Register on June 23, 2005, requesting comments on a rulemaking proceeding that could result in the revocation or amendment of its existing flammability standard, including a test for cigarette ignition of mattresses and mattress pads (16 CFR 1632). On January 13, 2005, the Commission issued a proposed flammability standard for mattresses and mattress and foundation sets that prescribes an open-flame ignition test. Some commenters to that rulemaking stated that once the new mattress standard was in effect, the cigarette ignition test currently required in 16 CFR 1632 would not be necessary and that conducting both tests would be burdensome for industry. The Commission issued an ANPRM to begin consideration of whether the existing mattress standard should be revoked or amended. A research project examining the criteria for self-sustained smoldering began in 2007. Staff also monitored progress of a CPSC staff project on cigarette ignition risk because performance of Reduced Ignition Propensity (RIP) cigarettes has the potential to change the smoldering hazard to mattresses. RIP cigarettes are required by legislation in all States. Staff research on cigarette ignition risk continued with an evaluation of RIP and conventional cigarettes as ignition sources for mattresses, and the research was completed in 2012. A report about the cigarette ignition risk research project was released in November 2012.