In December 2014, Lacson tendered his irrevocable resignation as PARR which took effect in February 2015. He recommended the transition of his office's accomplishments and best practices to a permanent government agency. Lacson viewed the scheduled sunset review of Republic Act 10121, otherwise known as “Philippine Disaster Risk Reduction and Management Act of 2010”, as an opportune time to propose possible remedial measures that will help improve the effectiveness of the law, especially on the aspect of disaster rehabilitation and recovery.