TNMP First Mortgage Bonds means those certain first mortgage bonds issued pursuant to the First Mortgage Indenture dated as of March 23, 2009, between TNMP and MUFG Union Bank, N.A. (f/k/a Union Bank, N.A.) (successor to The Bank of New York Mellon Trust Company, N.A.), as trustee thereunder, as it may be supplemented and amended from time to time.