0001193125-12-043637 8-K 2 20120202 1.01 9.01 20120207 20120207 NuStar Energy L.P. 0001110805 4610 742956831 DE 1231 8-K 34 001-16417 12577828 2330 NORTH LOOP 1604 WEST SAN ANTONIO TX 78248 2109182000 2330 NORTH LOOP 1604 WEST SAN ANTONIO TX 78248 VALERO L P 20020110 SHAMROCK LOGISTICS LP 20000331 8-K 1 d293722d8k.htm FORM 8-K EX-4.3 2 d293722dex43.htm SIXTH SUPPLEMENTAL INDENTURE, DATED AS OF FEBRUARY 2, 2012