Y1AA - CONSTRUCTION OF OFFICE BUILDINGS
Y1BE - CONSTRUCTION OF AIRPORT TERMINALS
Y1BZ - CONSTRUCTION OF OTHER AIRFIELD STRUCTURES
Y1CA - CONSTRUCTION OF SCHOOLS
Y1DA - CONSTRUCTION OF HOSPITALS AND INFIRMARIES
Y1FC - CONSTRUCTION OF TROOP HOUSING FACILITIES
Y1FF - CONSTRUCTION OF PENAL FACILITIES
Z1BE - MAINTENANCE OF AIRPORT TERMINALS
Z2AZ - REPAIR OR ALTERATION OF OTHER ADMINISTRATIVE FACILITIES AND SERVICE BUILDINGS
Z2FF - REPAIR OR ALTERATION OF PENAL FACILITIES