20 U.S.C. § 1092c

(a) All like loans treated as one To the extent practicable, and with the cooperation of the borrower, eligible lenders shall treat all loans made to a borrower under the same section of part B as one loan and shall submit one bill to the borrower for the repayment of all such loans for the monthly or other similar period of repayment. Any deferments on one such loan will be considered a deferment on the total amount of all such loans. (b) One lender, one guaranty agency To the extent practicable, and with the cooperation of the borrower, the guaranty agency shall ensure that a borrower only have one lender, one holder, one guaranty agency, and one servicer with which to maintain contact.