8. Counterparts. To facilitate execution, this Amendment may be executed in as many counterparts as may be convenient or required. The signature of, or on behalf of, each party, need not appear on each counterpart. All counterparts shall collectively constitute a single instrument. It shall not be necessary in making proof of this Amendment to produce or account for more than a single counterpart containing the respective signatures of, or on behalf of, each of the parties hereto. Any signature page to any counterpart may be detached from such counterpart without impairing the legal effect of the signatures thereon and thereafter attached to another counterpart identical thereto except having attached to it additional signature pages. Any counterpart of this Amendment may be signed by facsimile, and a copy of a signed counterpart of this Amendment transmitted by facsimile shall be deemed effective as an originally executed counterpart hereof.