45Z Change in Law

45Z Change in Law. Means a (1) repeal or amendment to Section 45Z of the Code, (2) change in, issuance of or promulgation of any proposed, temporary or final Treasury Regulations, (3) guidance from the Internal Revenue Service ("IRS") published in the Internal Revenue Bulletin and/or Cumulative Bulletin or (4) change to the Existing 45Z Guidance or Applicable Guidance (defined below), in each case with respect to clauses (1) through (4) that relates to or affects Section 45Z of the Code.