No Variation This Agreement cannot be amended or varied except in writing signed by the parties.
WAIVER AND VARIATION 13. No waiver or variation of this Parent Agreement shall be of any force unless such waiver or variation is agreed upon in writing and signed by an authorised representative of each of the Parties.
Variation No variation of this Agreement shall be effective unless it is in writing and signed by the parties (or their authorised representatives).
Variation of Charges (a) Subject to clause 5.6(b), ARTC will immediately pass on to the Access Holder any net effect of any imposition of new taxes or charges, increases or decreases in taxes or charges (other than income tax) which is a tax, royalty, rate, duty, levy or impost of general application imposed on ARTC by any government or regulatory authority and which is directly attributable to the provision by ARTC to the Access Holder of access to the Network.
Variation Agreement (1) The First Variation Agreement is ratified.