adequate safeguards to prevent contributions on behalf of a designated beneficiary in excess of those necessary to provide for the qualified education expenses of the beneficiary. . (c) Effective date The amendments made by this section shall apply to taxable years beginning after December 31, 2014. III 529 programs for elementary and secondary education expenses 301. 529 programs for pre-kindergarten, elementary, and secondary education expenses (a) In general Section 529(e)(3) of the Internal Revenue Code of 1986 is amended— (1) by redesignating subparagraph (B) as subparagraph (C)