Any written agreement between the Parties or determination by the arbitration tribunal shall be applicable retrospectively from the date of the Notice requesting an Unscheduled Price Re-determination.7.7 Floor PriceNotwithstanding the provisions of Sections 7.2, 7.3, 7.4, 7.5 or 7.6, the Price herunder shall never be less than the Price derived by adding i) the then current price for Helium pursuant to the Tier 1 SPA, to ii) the difference between the Base Price in the Tier 1 SPA and the Base Price in this Agreement.