Interest rates; underpayments and overpayments. The rates for interest determined under section 6621 of the Code for the calendar quarter beginning October 1, 2010, will be 4 percent for overpayments (3 percent in the case of a corporation), 4 percent for underpayments, and 6 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 1.5 percent.

Fringe benefits aircraft valuation formula. The Standard Industry Fare Level (SIFL) cents-per-mile rates and terminal charge in effect for the second half of 2010 are set forth for purposes of determining the value of noncommercial flights on employer-provided aircraft under section 1.61-2(g) of the regulations.

Revenue ruling obsoleted. This ruling obsoletes Rev. Rul. 2003-102, 2003-2 C.B. 559, which provides guidance on employer reimbursements of amounts paid by an employee to purchase nonprescription medicines or drugs.

This notice provides guidance on new section 106(f) of the Code, which requires that an over-the-counter medicine or drug be prescribed to be a medical expense for purposes of section 105. Notices 96-53, 2004-2, 2004-50, 2008-51, 2008-52 modified. Notice 2006-69 amplified.

The results of the 2009-10 allocation round of the qualifying advanced coal project program and the qualifying gasification project program provide the identity of the applicants that have been awarded credits and the amount of credits awarded to each applicant. This announcement also serves notice to applicants that the 2010-11 allocation round is currently open for the Code section 48A program pursuant to Notice 2009-24. The Service will not conduct a 2010-11 allocation round for the Code section 48B program because the total amount of available credits were allocated during the 2009-10 round.

This document contains a correction to Notice 2009-80, 2009-51 I.R.B. 859, which contained an incorrect name.