But it can only be modified or amended in ways that are satisfactory to the other parties.

All parties reached a satisfactory settlement.

There are prescribed ways of doing this. I know this is very frustrating and isn't satisfactory, but that's the way it is,

I feel more optimistic, ... because we have a solution to the problem of the pension fund, which was an enormous problem.

We will be back at six, hopefully to announce a deal is done.

[He went on to say that there was a] clear consensus ... at all times objective.