Young Women's Christian Association Pension Clarification Act of 2007 - Applies certain age discrimination safe harbor rules under the Employee Retirement Income Security Act of 1974 (ERISA) and the Age Discrimination in Employment Act of 1967 to civil actions brought on or after April 25, 2007, alleging any age discrimination violation occurring before June 29, 2005, with respect to any benefit provided under the Young Women's Christian Association Pension Plan.