Functional Anni manual question

I hate to make a whole thread just for this, but I can't for the life of me figure out a sentence. On page 467 of the second book, section 391., the first part of the first sentence makes no sense to me:

The leader f-tm-b (for the time being?) who have e-m-a-b (he maybe?) s b a (is by a?) instrument to be used until broken and then cast aside;

I must be missing something obvious, because no other sentences in the books so far have so thoroughly confused me.

Thanks for your help!

(by niftyboy1 for everyone)