.25 % ) notes and the ati 7.25% ( 7.25 % ) notes . the indenture for the 7.50% ( 7.50 % ) notes contains certain covenants that restrict the company 2019s ability to incur more debt ; guarantee indebtedness ; issue preferred stock ; pay dividends ; make certain investments ; merge , consolidate or sell assets ; enter into transactions with affiliates ; and enter into sale leaseback transactions . 6.25% ( 6