Section 23.158 - Margin documentation(a)General requirement. Each covered swap entity shall execute documentation with each counterparty that complies with the requirements of § 23.504 and that complies with this section, as applicable. For uncleared swaps between a covered swap entity and a counterparty that is a swap entity or a financial end user, the documentation shall provide the covered swap entity with the contractual right and obligation to exchange initial margin and variation margin in such amounts, in such form, and under such circumstances as are required by §§ 23.150 through 23.161 . With respect to the minimum transfer amount, if a covered swap entity and a counterparty that is a swap entity or a financial end user agree to have separate minimum transfer amounts for initial and variation margin, the documentation shall specify the amounts to be allocated for initial margin and variation margin. Such amounts, on a combined basis, must not exceed the minimum transfer amount, as the term is defined in § 23.151 .(b)Contents of the documentation. The margin documentation shall: (1) Specify the methods, procedures, rules, inputs, and data sources to be used for determining the value of uncleared swaps for purposes of calculating variation margin;(2) Describe the methods, procedures, rules, inputs, and data sources to be used to calculate initial margin for uncleared swaps entered into between the covered swap entity and the counterparty; and(3) Specify the procedures by which any disputes concerning the valuation of uncleared swaps, or the valuation of assets collected or posted as initial margin or variation margin may be resolved. 81 FR 695 , Jan. 6, 2016, as amended at 86 FR 6858 , Jan. 25, 2021 81 FR 695, 1/6/2016; 86 FR 6858, 2/24/2021