Template:Isda Tax Event summ
Basically, the gist is this: if the rules change after the Trade Date such that you have to gross up an {{{{{1}}}|Indemnifiable Tax}} would weren’t expecting to when you priced the trade, you have a right to get out of the trade, rather than having to ship the gross up for the remainder of the {{{{{1}}}|Transaction}}.
That said, this paragraph is a bastard to understand. Have a gander at the JC’s nutshell version (premium only, sorry) and you’ll see it is not such a bastard after all, then.
In the context of cleared swaps, you typically add a third limb, which is along the lines of:
- (3) required to make a deduction from a payment under an Associated LCH Transaction where no corresponding gross up amount is required under the corresponding {{{{{1}}}|Transaction}} Payment under this {{{{{1}}}|Agreement}}.