( A ) may and shall adapt the IPT Minimum Price to the amendments that result from changes in the fast-moving telecommunications market, market research, and product and service developments. ( A ) shall notify the Sales Partner of amendments to the IPT Minimum Price in text form with a notice period of 2 (two) weeks prior to the entry into force of the amendments. The Sales Partner shall declare its implied approval of the new IPT Minimum Price by accepting brokering upon receipt of the notification of change. The IPT Minimum Price valid at the time the Customer Agreement is concluded shall generally apply to the calculation of the Icommission