W) relates to Securities of different descriptions and the Purchase Price is apportioned by the parties among Purchased Securities of each such description, a separate Margin Ratio shall apply in respect of Securities of each such description), or such other proportion as the panics may agree with respect to that Transaction; (aa) "Margin Securities", in relation to a Margin Transfer, Securities reasonably acceptable to the party calling ter such Margin Transfer, (bb) "Margin Transfer", any, or any combination of, the payment or repayment of Cash Margin and the transfer of Margin Securities or Equivalent Margin Securities: (a) "Market Value", with respect in any Securities as of any time on any date, the price for such Securities at such time on such date obtained from a generally recognised source agreed to by the panics (and where different prices arc obtained for different delivery dates, the price so obtainable for the earliest available such delivery date) (provided that the price of Securities that are suspended shall (for the purposes of paragraph 4) be nil unless the panics otherwise agree and (for all other purposes) shall be the price of those Securities as of close of business on the dealing day in the relevant market last preceding the date of suspension) plus the aggregate amount of Income which, as of such date, has accrued but not yet been paid in respect of the Securities to the extent not included in such price as of such date, and for these purposes any sum in a currency other than the Contractual Currency for the Transaction in question shall be converted into such Contractual Currency at the Spot Rate prevailing at the relevant time: (dd) (ee) "Net Exposure-. the meaning specified in paragraph 4(c); the - Net Margin" provided to a patty at any time, the excess (if any) at (hat time of (i) the sum of the amount of Cash Margin paid to that party (including accrued interest on such Cash Margin which has not been paid to t