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.