This excerpt taken from the HOG 10-K filed Mar 3, 2006.
Termination and Amendment. The Board or the Committee may amend, alter, suspend, discontinue or terminate this Plan at any time, subject to the following limitations:
(i) the Board must approve any amendment of this Plan to the extent the Company determines such approval is required by: (A) action of the Board, (B) applicable corporate law or (C) any other applicable law;
(ii) shareholders must approve any amendment of this Plan to the extent the Company determines such approval is required by: (A) Section 16 of the Exchange Act, (B) the Code, (C) the listing requirements of any principal securities exchange or market on which the Shares are then traded or (D) any other applicable law; and
(iii) shareholders must approve any of the following Plan amendments: (A) an amendment to materially increase any number of Shares specified in Section 6(a) or 6(d) (except as permitted by Section 16); or (B) an amendment to the provisions of Section 14(e).