The Secretary shall conduct a program of research, development, demonstration, and commercial application for utilizing coal-derived liquid or gaseous fuels, including ultra-clean coal-water slurries, in diesel engines. The program shall address—

(1) required engine retrofit technology;

(2) coal-fuel production technology;

(3) emission control requirements;

(4) the testing of low-Btu highly reactive fuels;

(5) fuel delivery and storage systems requirements; and

(6) other infrastructure required to support commercial deployment.